82311851556 has 108 divisors (see below), whose sum is σ = 229161494016. Its totient is φ = 24892734240.

The previous prime is 82311851507. The next prime is 82311851579. The reversal of 82311851556 is 65515811328.

82311851556 is a `hidden beast` number, since 8 + 2 + 3 + 11 + 85 + 1 + 556 = 666.

It is a super-2 number, since 2×82311851556² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2172285 + ... + 2209851.

Almost surely, 2^82311851556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82311851556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114580747008).

82311851556 is an abundant number, since it is smaller than the sum of its proper divisors (146849642460).

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

82311851556 is a wasteful number, since it uses less digits than its factorization.

82311851556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38102 (or 38086 counting only the distinct ones).

The product of its digits is 288000, while the sum is 45.

The spelling of 82311851556 in words is "eighty-two billion, three hundred eleven million, eight hundred fifty-one thousand, five hundred fifty-six".