180997891739 has 16 divisors (see below), whose sum is σ = 213573298176. Its totient is φ = 150104275200.

The previous prime is 180997891729. The next prime is 180997891747. The reversal of 180997891739 is 937198799081.

It is a cyclic number.

It is not a de Polignac number, because 180997891739 - 2²⁸ = 180729456283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (180997891709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 951659 + ... + 1125899.

It is an arithmetic number, because the mean of its divisors is an integer number (13348331136).

Almost surely, 2^180997891739 is an apocalyptic number.

180997891739 is a deficient number, since it is larger than the sum of its proper divisors (32575406437).

180997891739 is a wasteful number, since it uses less digits than its factorization.

180997891739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179066.

The product of its (nonzero) digits is 61725888, while the sum is 71.

The spelling of 180997891739 in words is "one hundred eighty billion, nine hundred ninety-seven million, eight hundred ninety-one thousand, seven hundred thirty-nine".