82740779424 has 120 divisors (see below), whose sum is σ = 257652490788. Its totient is φ = 25957877760.

The previous prime is 82740779419. The next prime is 82740779437. The reversal of 82740779424 is 42497704728.

82740779424 is a `hidden beast` number, since 82 + 74 + 0 + 7 + 79 + 424 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 62366071824 + 20374707600 = 249732^2 + 142740^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 894807 + ... + 982934.

Almost surely, 2^82740779424 is an apocalyptic number.

It is an amenable number.

82740779424 is an abundant number, since it is smaller than the sum of its proper divisors (174911711364).

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

82740779424 is a wasteful number, since it uses less digits than its factorization.

82740779424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877780 (or 1877763 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 54.

The spelling of 82740779424 in words is "eighty-two billion, seven hundred forty million, seven hundred seventy-nine thousand, four hundred twenty-four".