82717861512 has 128 divisors (see below), whose sum is σ = 244404034560. Its totient is φ = 22999153920.

The previous prime is 82717861493. The next prime is 82717861553. The reversal of 82717861512 is 21516871728.

It is a super-2 number, since 2×82717861512² (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 31 ways as a sum of consecutive naturals, for example, 500983 + ... + 645305.

It is an arithmetic number, because the mean of its divisors is an integer number (1909406520).

Almost surely, 2^82717861512 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 82717861512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122202017280).

82717861512 is an abundant number, since it is smaller than the sum of its proper divisors (161686173048).

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

82717861512 is a wasteful number, since it uses less digits than its factorization.

82717861512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144523 (or 144519 counting only the distinct ones).

The product of its digits is 376320, while the sum is 48.

The spelling of 82717861512 in words is "eighty-two billion, seven hundred seventeen million, eight hundred sixty-one thousand, five hundred twelve".