81402315622 has 16 divisors (see below), whose sum is σ = 129157699680. Its totient is φ = 38398231872.

The previous prime is 81402315587. The next prime is 81402315637. The reversal of 81402315622 is 22651320418.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12117297 + ... + 12124012.

It is an arithmetic number, because the mean of its divisors is an integer number (8072356230).

Almost surely, 2^81402315622 is an apocalyptic number.

81402315622 is a deficient number, since it is larger than the sum of its proper divisors (47755384058).

81402315622 is a wasteful number, since it uses less digits than its factorization.

81402315622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24241407.

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 81402315622 in words is "eighty-one billion, four hundred two million, three hundred fifteen thousand, six hundred twenty-two".