64854015584 has 96 divisors (see below), whose sum is σ = 139747700736. Its totient is φ = 29536151040.

The previous prime is 64854015571. The next prime is 64854015593. The reversal of 64854015584 is 48551045846.

It is a super-2 number, since 2×64854015584² (a number of 22 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 1254569 + ... + 1305239.

It is an arithmetic number, because the mean of its divisors is an integer number (1455705216).

Almost surely, 2^64854015584 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 64854015584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69873850368).

64854015584 is an abundant number, since it is smaller than the sum of its proper divisors (74893685152).

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

64854015584 is a wasteful number, since it uses less digits than its factorization.

64854015584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50788 (or 50780 counting only the distinct ones).

The product of its (nonzero) digits is 3072000, while the sum is 50.

The spelling of 64854015584 in words is "sixty-four billion, eight hundred fifty-four million, fifteen thousand, five hundred eighty-four".