1156787973180 has 216 divisors, whose sum is σ = 4083071952960. Its totient is φ = 264326872320.

The previous prime is 1156787973161. The next prime is 1156787973181. The reversal of 1156787973180 is 813797876511.

1156787973180 is a `hidden beast` number, since 1 + 156 + 7 + 87 + 97 + 318 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156787973181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 31213101 + ... + 31250139.

Almost surely, 2^{1156787973180} is an apocalyptic number.

1156787973180 is a gapful number since it is divisible by the number (10) 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 1156787973180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2041535976480).

1156787973180 is an abundant number, since it is smaller than the sum of its proper divisors (2926283979780).

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

1156787973180 is a wasteful number, since it uses less digits than its factorization.

1156787973180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40609 (or 40597 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 63.

The spelling of 1156787973180 in words is "one trillion, one hundred fifty-six billion, seven hundred eighty-seven million, nine hundred seventy-three thousand, one hundred eighty".