64878952320 has 1280 divisors, whose sum is σ = 302309884800. Its totient is φ = 12867600384.

The previous prime is 64878952309. The next prime is 64878952339. The reversal of 64878952320 is 2325987846.

64878952320 is a `hidden beast` number, since 6 + 48 + 78 + 9 + 523 + 2 + 0 = 666.

64878952320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 80196076 + ... + 80196884.

Almost surely, 2^64878952320 is an apocalyptic number.

64878952320 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 64878952320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151154942400).

64878952320 is an abundant number, since it is smaller than the sum of its proper divisors (237430932480).

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

64878952320 is a wasteful number, since it uses less digits than its factorization.

64878952320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877 (or 856 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 64878952320 in words is "sixty-four billion, eight hundred seventy-eight million, nine hundred fifty-two thousand, three hundred twenty".