4509361620 has 72 divisors (see below), whose sum is σ = 13726885536. Its totient is φ = 1198233792.

The previous prime is 4509361607. The next prime is 4509361651. The reversal of 4509361620 is 261639054.

It is a happy number.

4509361620 is a `hidden beast` number, since 450 + 93 + 61 + 62 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6679 + ... + 95201.

It is an arithmetic number, because the mean of its divisors is an integer number (190651188).

Almost surely, 2^4509361620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4509361620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6863442768).

4509361620 is an abundant number, since it is smaller than the sum of its proper divisors (9217523916).

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

4509361620 is a wasteful number, since it uses less digits than its factorization.

4509361620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88821 (or 88816 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 4509361620 is about 67151.7804678327. The cubic root of 4509361620 is about 1652.1076976809.

The spelling of 4509361620 in words is "four billion, five hundred nine million, three hundred sixty-one thousand, six hundred twenty".