81029623086 has 48 divisors (see below), whose sum is σ = 181683356400. Its totient is φ = 26069132544.

The previous prime is 81029623061. The next prime is 81029623091. The reversal of 81029623086 is 68032692018.

81029623086 is a `hidden beast` number, since 8 + 10 + 2 + 9 + 623 + 0 + 8 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1507750 + ... + 1560566.

It is an arithmetic number, because the mean of its divisors is an integer number (3785069925).

Almost surely, 2^81029623086 is an apocalyptic number.

81029623086 is an abundant number, since it is smaller than the sum of its proper divisors (100653733314).

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

81029623086 is a wasteful number, since it uses less digits than its factorization.

81029623086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55793 (or 55790 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 81029623086 in words is "eighty-one billion, twenty-nine million, six hundred twenty-three thousand, eighty-six".