81630087096 has 64 divisors (see below), whose sum is σ = 210763422720. Its totient is φ = 26319144960.

The previous prime is 81630087079. The next prime is 81630087107. The reversal of 81630087096 is 69078003618.

It is a super-2 number, since 2×81630087096² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1523416 + ... + 1576088.

It is an arithmetic number, because the mean of its divisors is an integer number (3293178480).

Almost surely, 2^81630087096 is an apocalyptic number.

It is an amenable number.

81630087096 is an abundant number, since it is smaller than the sum of its proper divisors (129133335624).

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

81630087096 is a wasteful number, since it uses less digits than its factorization.

81630087096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54796 (or 54792 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 81630087096 in words is "eighty-one billion, six hundred thirty million, eighty-seven thousand, ninety-six".