64475654880 has 384 divisors, whose sum is σ = 263126707200. Its totient is φ = 12887506944.

The previous prime is 64475654857. The next prime is 64475654933. The reversal of 64475654880 is 8845657446.

It is a super-2 number, since 2×64475654880² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a self number, because there is not a number n which added to its sum of digits gives 64475654880.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 791076 + ... + 868764.

It is an arithmetic number, because the mean of its divisors is an integer number (685225800).

Almost surely, 2^64475654880 is an apocalyptic number.

64475654880 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 64475654880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131563353600).

64475654880 is an abundant number, since it is smaller than the sum of its proper divisors (198651052320).

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

64475654880 is a wasteful number, since it uses less digits than its factorization.

64475654880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77746 (or 77738 counting only the distinct ones).

The product of its (nonzero) digits is 25804800, while the sum is 57.

The spelling of 64475654880 in words is "sixty-four billion, four hundred seventy-five million, six hundred fifty-four thousand, eight hundred eighty".