181907368036 has 9 divisors (see below), whose sum is σ = 318339386841. Its totient is φ = 90953257512.

The previous prime is 181907368007. The next prime is 181907368043. The reversal of 181907368036 is 630863709181.

The square root of 181907368036 is 426506.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 25680062500 + 156227305536 = 160250^2 + 395256^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 746386 + ... + 959638.

Almost surely, 2^181907368036 is an apocalyptic number.

181907368036 is the 426506-th square number.

It is an amenable number.

181907368036 is a deficient number, since it is larger than the sum of its proper divisors (136432018805).

181907368036 is an frugal number, since it uses more digits than its factorization.

181907368036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426510 (or 213255 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 181907368036 in words is "one hundred eighty-one billion, nine hundred seven million, three hundred sixty-eight thousand, thirty-six".