180971664534 has 16 divisors (see below), whose sum is σ = 402159254640. Its totient is φ = 60323888160.

The previous prime is 180971664529. The next prime is 180971664541. The reversal of 180971664534 is 435466179081.

180971664534 is a `hidden beast` number, since 1 + 8 + 0 + 97 + 16 + 6 + 4 + 534 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 3351327121 = 180971664534 / (1 + 8 + 0 + 9 + 7 + 1 + 6 + 6 + 4 + 5 + 3 + 4).

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, 1675663507 + ... + 1675663614.

It is an arithmetic number, because the mean of its divisors is an integer number (25134953415).

Almost surely, 2^180971664534 is an apocalyptic number.

180971664534 is an abundant number, since it is smaller than the sum of its proper divisors (221187590106).

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

180971664534 is a wasteful number, since it uses less digits than its factorization.

180971664534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3351327132 (or 3351327126 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 180971664534 in words is "one hundred eighty billion, nine hundred seventy-one million, six hundred sixty-four thousand, five hundred thirty-four".