82717874644 has 12 divisors (see below), whose sum is σ = 153271356084. Its totient is φ = 38926058624.

The previous prime is 82717874641. The next prime is 82717874651. The reversal of 82717874644 is 44647871728.

It can be written as a sum of positive squares in 2 ways, for example, as 43790584644 + 38927290000 = 209262^2 + 197300^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82717874641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608219599 + ... + 608219734.

It is an arithmetic number, because the mean of its divisors is an integer number (12772613007).

Almost surely, 2^82717874644 is an apocalyptic number.

It is an amenable number.

82717874644 is a deficient number, since it is larger than the sum of its proper divisors (70553481440).

82717874644 is a wasteful number, since it uses less digits than its factorization.

82717874644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216439354 (or 1216439352 counting only the distinct ones).

The product of its digits is 16859136, while the sum is 58.

The spelling of 82717874644 in words is "eighty-two billion, seven hundred seventeen million, eight hundred seventy-four thousand, six hundred forty-four".