3156481680 has 160 divisors (see below), whose sum is σ = 10757311488. Its totient is φ = 759283200.

The previous prime is 3156481673. The next prime is 3156481687. The reversal of 3156481680 is 861846513.

It is an interprime number because it is at equal distance from previous prime (3156481673) and next prime (3156481687).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (3156481687) 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, 341277 + ... + 350403.

Almost surely, 2^3156481680 is an apocalyptic number.

3156481680 is a gapful number since it is divisible by the number (30) 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 3156481680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5378655744).

3156481680 is an abundant number, since it is smaller than the sum of its proper divisors (7600829808).

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

3156481680 is a wasteful number, since it uses less digits than its factorization.

3156481680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9285 (or 9279 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 3156481680 is about 56182.5745227112. The cubic root of 3156481680 is about 1466.9019672987.

The spelling of 3156481680 in words is "three billion, one hundred fifty-six million, four hundred eighty-one thousand, six hundred eighty".