6165640944 has 120 divisors (see below), whose sum is σ = 18232551792. Its totient is φ = 2016368640.

The previous prime is 6165640927. The next prime is 6165640969. The reversal of 6165640944 is 4490465616.

It is a happy number.

It is a super-2 number, since 2×6165640944² = 76030256500658422272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6165640944.

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, 191104 + ... + 221024.

Almost surely, 2^6165640944 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 6165640944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9116275896).

6165640944 is an abundant number, since it is smaller than the sum of its proper divisors (12066910848).

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

6165640944 is a wasteful number, since it uses less digits than its factorization.

6165640944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29997 (or 29979 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 6165640944 is about 78521.5953989729. The cubic root of 6165640944 is about 1833.6906759385.

The spelling of 6165640944 in words is "six billion, one hundred sixty-five million, six hundred forty thousand, nine hundred forty-four".