3156402816 has 576 divisors, whose sum is σ = 11639628000. Its totient is φ = 846526464.

The previous prime is 3156402773. The next prime is 3156402817. The reversal of 3156402816 is 6182046513.

It is a happy number.

3156402816 is a `hidden beast` number, since 3 + 1 + 5 + 640 + 2 + 8 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3156402817) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 28957770 + ... + 28957878.

Almost surely, 2^3156402816 is an apocalyptic number.

3156402816 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 3156402816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5819814000).

3156402816 is an abundant number, since it is smaller than the sum of its proper divisors (8483225184).

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

3156402816 is a wasteful number, since it uses less digits than its factorization.

3156402816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 3156402816 is about 56181.8726636982. The cubic root of 3156402816 is about 1466.8897504560.

The spelling of 3156402816 in words is "three billion, one hundred fifty-six million, four hundred two thousand, eight hundred sixteen".