64402260624 has 640 divisors, whose sum is σ = 222585753600. Its totient is φ = 17627258880.

The previous prime is 64402260599. The next prime is 64402260653. The reversal of 64402260624 is 42606220446.

64402260624 is a `hidden beast` number, since 6 + 4 + 4 + 0 + 2 + 26 + 0 + 624 = 666.

64402260624 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 (36).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 305223879 + ... + 305224089.

It is an arithmetic number, because the mean of its divisors is an integer number (347790240).

Almost surely, 2^64402260624 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 64402260624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111292876800).

64402260624 is an abundant number, since it is smaller than the sum of its proper divisors (158183492976).

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

64402260624 is a wasteful number, since it uses less digits than its factorization.

64402260624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The spelling of 64402260624 in words is "sixty-four billion, four hundred two million, two hundred sixty thousand, six hundred twenty-four".