180138764440 has 64 divisors (see below), whose sum is σ = 406999756800. Its totient is φ = 71756074368.

The previous prime is 180138764431. The next prime is 180138764467. The reversal of 180138764440 is 44467831081.

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, 10663921 + ... + 10680799.

It is an arithmetic number, because the mean of its divisors is an integer number (6359371200).

Almost surely, 2^180138764440 is an apocalyptic number.

180138764440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180138764440 is an abundant number, since it is smaller than the sum of its proper divisors (226860992360).

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

180138764440 is a wasteful number, since it uses less digits than its factorization.

180138764440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17984 (or 17980 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 180138764440 in words is "one hundred eighty billion, one hundred thirty-eight million, seven hundred sixty-four thousand, four hundred forty".