82949420561 has 16 divisors (see below), whose sum is σ = 95533006848. Its totient is φ = 70550298000.

The previous prime is 82949420501. The next prime is 82949420647. The reversal of 82949420561 is 16502494928.

It is a de Polignac number, because none of the positive numbers 2^k-82949420561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82949420501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 919856 + ... + 1005998.

It is an arithmetic number, because the mean of its divisors is an integer number (5970812928).

Almost surely, 2^82949420561 is an apocalyptic number.

It is an amenable number.

82949420561 is a deficient number, since it is larger than the sum of its proper divisors (12583586287).

82949420561 is a wasteful number, since it uses less digits than its factorization.

82949420561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87212.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 82949420561 in words is "eighty-two billion, nine hundred forty-nine million, four hundred twenty thousand, five hundred sixty-one".