81872733630130 has 32 divisors (see below), whose sum is σ = 147452524513200. Its totient is φ = 32730964180992.

The previous prime is 81872733630113. The next prime is 81872733630139. The reversal of 81872733630130 is 3103633727818.

It can be written as a sum of positive squares in 8 ways, for example, as 57868289908641 + 24004443721489 = 7607121^2 + 4899433^2 .

It is not an unprimeable number, because it can be changed into a prime (81872733630139) 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, 133711554 + ... + 134322466.

Almost surely, 2^{81872733630130} is an apocalyptic number.

81872733630130 is a deficient number, since it is larger than the sum of its proper divisors (65579790883070).

81872733630130 is a wasteful number, since it uses less digits than its factorization.

81872733630130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618318.

The product of its (nonzero) digits is 3048192, while the sum is 52.

The spelling of 81872733630130 in words is "eighty-one trillion, eight hundred seventy-two billion, seven hundred thirty-three million, six hundred thirty thousand, one hundred thirty".