3715721856 has 256 divisors, whose sum is σ = 13673548800. Its totient is φ = 965053440.

The previous prime is 3715721851. The next prime is 3715721857. The reversal of 3715721856 is 6581275173.

It is a happy number.

3715721856 is a `hidden beast` number, since 3 + 71 + 572 + 1 + 8 + 5 + 6 = 666.

3715721856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3715721856² = 27613177822312169472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3715721851) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259131 + ... + 273093.

It is an arithmetic number, because the mean of its divisors is an integer number (53412300).

Almost surely, 2^3715721856 is an apocalyptic number.

3715721856 is a gapful number since it is divisible by the number (36) 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 3715721856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6836774400).

3715721856 is an abundant number, since it is smaller than the sum of its proper divisors (9957826944).

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

3715721856 is a wasteful number, since it uses less digits than its factorization.

3715721856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14004 (or 13986 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 3715721856 is about 60956.7211716641. The cubic root of 3715721856 is about 1548.8679706584.

The spelling of 3715721856 in words is "three billion, seven hundred fifteen million, seven hundred twenty-one thousand, eight hundred fifty-six".