4644691968 has 448 divisors, whose sum is σ = 15727680000. Its totient is φ = 1213857792.

The previous prime is 4644691943. The next prime is 4644691979. The reversal of 4644691968 is 8691964464.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160161778 + ... + 160161806.

Almost surely, 2^4644691968 is an apocalyptic number.

4644691968 is a gapful number since it is divisible by the number (48) 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 4644691968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7863840000).

4644691968 is an abundant number, since it is smaller than the sum of its proper divisors (11082988032).

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

4644691968 is an equidigital number, since it uses as much as digits as its factorization.

4644691968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 60 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 57.

The square root of 4644691968 is about 68151.9769926009. The cubic root of 4644691968 is about 1668.4721906148.

The spelling of 4644691968 in words is "four billion, six hundred forty-four million, six hundred ninety-one thousand, nine hundred sixty-eight".