64706157582 has 64 divisors (see below), whose sum is σ = 143369568000. Its totient is φ = 19303764480.

The previous prime is 64706157569. The next prime is 64706157619. The reversal of 64706157582 is 28575160746.

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, 10030294 + ... + 10036742.

It is an arithmetic number, because the mean of its divisors is an integer number (2240149500).

Almost surely, 2^64706157582 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64706157582, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71684784000).

64706157582 is an abundant number, since it is smaller than the sum of its proper divisors (78663410418).

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

64706157582 is a wasteful number, since it uses less digits than its factorization.

64706157582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8801.

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 64706157582 in words is "sixty-four billion, seven hundred six million, one hundred fifty-seven thousand, five hundred eighty-two".