82972909578 has 24 divisors (see below), whose sum is σ = 179692812288. Its totient is φ = 25530125712.

The previous prime is 82972909543. The next prime is 82972909583. The reversal of 82972909578 is 87590927928.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40912650 + ... + 40914677.

It is an arithmetic number, because the mean of its divisors is an integer number (7487200512).

Almost surely, 2^82972909578 is an apocalyptic number.

82972909578 is an abundant number, since it is smaller than the sum of its proper divisors (96719902710).

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

82972909578 is a wasteful number, since it uses less digits than its factorization.

82972909578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81827358 (or 81827345 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 66.

The spelling of 82972909578 in words is "eighty-two billion, nine hundred seventy-two million, nine hundred nine thousand, five hundred seventy-eight".