82560874640 has 40 divisors (see below), whose sum is σ = 191975262648. Its totient is φ = 33020697600.

The previous prime is 82560874631. The next prime is 82560874661. The reversal of 82560874640 is 4647806528.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 38070253456 + 44490621184 = 195116^2 + 210928^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 739964 + ... + 844196.

Almost surely, 2^82560874640 is an apocalyptic number.

82560874640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

82560874640 is an abundant number, since it is smaller than the sum of its proper divisors (109414388008).

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

82560874640 is a wasteful number, since it uses less digits than its factorization.

82560874640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114147 (or 114141 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 50.

The spelling of 82560874640 in words is "eighty-two billion, five hundred sixty million, eight hundred seventy-four thousand, six hundred forty".