81280372922 has 32 divisors (see below), whose sum is σ = 140466040704. Its totient is φ = 34552627200.

The previous prime is 81280372889. The next prime is 81280372963. The reversal of 81280372922 is 22927308218.

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, 4526522 + ... + 4544442.

It is an arithmetic number, because the mean of its divisors is an integer number (4389563772).

Almost surely, 2^81280372922 is an apocalyptic number.

81280372922 is a deficient number, since it is larger than the sum of its proper divisors (59185667782).

81280372922 is a wasteful number, since it uses less digits than its factorization.

81280372922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20534.

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 81280372922 in words is "eighty-one billion, two hundred eighty million, three hundred seventy-two thousand, nine hundred twenty-two".