4645555920 has 120 divisors (see below), whose sum is σ = 15658319976. Its totient is φ = 1234289664.

The previous prime is 4645555919. The next prime is 4645555927. The reversal of 4645555920 is 295555464.

4645555920 is a `hidden beast` number, since 4 + 6 + 4 + 5 + 55 + 592 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 120033936 + 4525521984 = 10956^2 + 67272^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4645555927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 187794 + ... + 211086.

Almost surely, 2^4645555920 is an apocalyptic number.

4645555920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4645555920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7829159988).

4645555920 is an abundant number, since it is smaller than the sum of its proper divisors (11012764056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4645555920 is a wasteful number, since it uses less digits than its factorization.

4645555920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23589 (or 23580 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 45.

The square root of 4645555920 is about 68158.3151200204. The cubic root of 4645555920 is about 1668.5756341821.

The spelling of 4645555920 in words is "four billion, six hundred forty-five million, five hundred fifty-five thousand, nine hundred twenty".