180943699056 has 80 divisors (see below), whose sum is σ = 471965470848. Its totient is φ = 59730745600.

The previous prime is 180943698979. The next prime is 180943699067. The reversal of 180943699056 is 650996349081.

It is a super-2 number, since 2×180943699056² (a number of 23 digits) contains 22 as substring.

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, 30099091 + ... + 30105101.

Almost surely, 2^180943699056 is an apocalyptic number.

180943699056 is a gapful number since it is divisible by the number (16) 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 180943699056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235982735424).

180943699056 is an abundant number, since it is smaller than the sum of its proper divisors (291021771792).

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

180943699056 is a wasteful number, since it uses less digits than its factorization.

180943699056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11990 (or 11984 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 60.

The spelling of 180943699056 in words is "one hundred eighty billion, nine hundred forty-three million, six hundred ninety-nine thousand, fifty-six".