180972656140 has 24 divisors (see below), whose sum is σ = 385714858032. Its totient is φ = 71308628160.

The previous prime is 180972656099. The next prime is 180972656147. The reversal of 180972656140 is 41656279081.

It is a happy number.

It is a super-2 number, since 2×180972656140² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (180972656147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67525771 + ... + 67528450.

It is an arithmetic number, because the mean of its divisors is an integer number (16071452418).

Almost surely, 2^180972656140 is an apocalyptic number.

180972656140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180972656140 is an abundant number, since it is smaller than the sum of its proper divisors (204742201892).

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

180972656140 is a wasteful number, since it uses less digits than its factorization.

180972656140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135054297 (or 135054295 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 180972656140 in words is "one hundred eighty billion, nine hundred seventy-two million, six hundred fifty-six thousand, one hundred forty".