1156172856180 has 48 divisors (see below), whose sum is σ = 3290354237184. Its totient is φ = 303258453120.

The previous prime is 1156172856151. The next prime is 1156172856193. The reversal of 1156172856180 is 816582716511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157943452 + ... + 157950771.

It is an arithmetic number, because the mean of its divisors is an integer number (68549046608).

Almost surely, 2^{1156172856180} is an apocalyptic number.

1156172856180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1156172856180 is an abundant number, since it is smaller than the sum of its proper divisors (2134181381004).

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

1156172856180 is a wasteful number, since it uses less digits than its factorization.

1156172856180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315894296 (or 315894294 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 51.

The spelling of 1156172856180 in words is "one trillion, one hundred fifty-six billion, one hundred seventy-two million, eight hundred fifty-six thousand, one hundred eighty".