81407406882 has 32 divisors (see below), whose sum is σ = 167279313600. Its totient is φ = 26392281408.

The previous prime is 81407406851. The next prime is 81407406917. The reversal of 81407406882 is 28860470418.

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, 521344 + ... + 659252.

It is an arithmetic number, because the mean of its divisors is an integer number (5227478550).

Almost surely, 2^81407406882 is an apocalyptic number.

81407406882 is an abundant number, since it is smaller than the sum of its proper divisors (85871906718).

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

81407406882 is a wasteful number, since it uses less digits than its factorization.

81407406882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140610.

The product of its (nonzero) digits is 688128, while the sum is 48.

The spelling of 81407406882 in words is "eighty-one billion, four hundred seven million, four hundred six thousand, eight hundred eighty-two".