82578587574 has 64 divisors (see below), whose sum is σ = 192652162560. Its totient is φ = 23107818240.

The previous prime is 82578587527. The next prime is 82578587633. The reversal of 82578587574 is 47578587528.

It is a congruent number.

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, 1238562 + ... + 1303530.

It is an arithmetic number, because the mean of its divisors is an integer number (3010190040).

Almost surely, 2^82578587574 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82578587574, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96326081280).

82578587574 is an abundant number, since it is smaller than the sum of its proper divisors (110073574986).

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

82578587574 is a wasteful number, since it uses less digits than its factorization.

82578587574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65605.

The product of its digits is 175616000, while the sum is 66.

The spelling of 82578587574 in words is "eighty-two billion, five hundred seventy-eight million, five hundred eighty-seven thousand, five hundred seventy-four".