64460878320 has 160 divisors (see below), whose sum is σ = 201830564160. Its totient is φ = 17018060800.

The previous prime is 64460878297. The next prime is 64460878357. The reversal of 64460878320 is 2387806446.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 64460878320.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13182436 + ... + 13187324.

It is an arithmetic number, because the mean of its divisors is an integer number (1261441026).

Almost surely, 2^64460878320 is an apocalyptic number.

64460878320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64460878320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100915282080).

64460878320 is an abundant number, since it is smaller than the sum of its proper divisors (137369685840).

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

64460878320 is a wasteful number, since it uses less digits than its factorization.

64460878320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5443 (or 5437 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 48.

The spelling of 64460878320 in words is "sixty-four billion, four hundred sixty million, eight hundred seventy-eight thousand, three hundred twenty".