180712217856 has 72 divisors (see below), whose sum is σ = 485627746240. Its totient is φ = 59652550656.

The previous prime is 180712217813. The next prime is 180712217909. The reversal of 180712217856 is 658712217081.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1063141 + ... + 1221348.

Almost surely, 2^180712217856 is an apocalyptic number.

180712217856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

180712217856 is an abundant number, since it is smaller than the sum of its proper divisors (304915528384).

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

180712217856 is a wasteful number, since it uses less digits than its factorization.

180712217856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2284611 (or 2284597 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 48.

The spelling of 180712217856 in words is "one hundred eighty billion, seven hundred twelve million, two hundred seventeen thousand, eight hundred fifty-six".