81270617084 has 12 divisors (see below), whose sum is σ = 142231261200. Its totient is φ = 40633113888.

The previous prime is 81270617023. The next prime is 81270617101. The reversal of 81270617084 is 48071607218.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463889 + ... + 614600.

It is an arithmetic number, because the mean of its divisors is an integer number (11852605100).

Almost surely, 2^81270617084 is an apocalyptic number.

It is an amenable number.

81270617084 is a deficient number, since it is larger than the sum of its proper divisors (60960644116).

81270617084 is a wasteful number, since it uses less digits than its factorization.

81270617084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097332 (or 1097330 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 44.

The spelling of 81270617084 in words is "eighty-one billion, two hundred seventy million, six hundred seventeen thousand, eighty-four".