82471558644 has 96 divisors (see below), whose sum is σ = 214639649280. Its totient is φ = 27384739200.

The previous prime is 82471558639. The next prime is 82471558661. The reversal of 82471558644 is 44685517428.

82471558644 is a `hidden beast` number, since 8 + 2 + 4 + 7 + 15 + 586 + 44 = 666.

It is a super-2 number, since 2×82471558644² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50876154 + ... + 50877774.

It is an arithmetic number, because the mean of its divisors is an integer number (2235829680).

Almost surely, 2^82471558644 is an apocalyptic number.

It is an amenable number.

82471558644 is an abundant number, since it is smaller than the sum of its proper divisors (132168090636).

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

82471558644 is a wasteful number, since it uses less digits than its factorization.

82471558644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3158 (or 3150 counting only the distinct ones).

The product of its digits is 8601600, while the sum is 54.

The spelling of 82471558644 in words is "eighty-two billion, four hundred seventy-one million, five hundred fifty-eight thousand, six hundred forty-four".