64636710400 has 120 divisors (see below), whose sum is σ = 160400548440. Its totient is φ = 25813032960.

The previous prime is 64636710377. The next prime is 64636710409. The reversal of 64636710400 is 401763646.

It is a self number, because there is not a number n which added to its sum of digits gives 64636710400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64636710409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8661871 + ... + 8669329.

It is an arithmetic number, because the mean of its divisors is an integer number (1336671237).

Almost surely, 2^64636710400 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 64636710400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80200274220).

64636710400 is an abundant number, since it is smaller than the sum of its proper divisors (95763838040).

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

64636710400 is an equidigital number, since it uses as much as digits as its factorization.

64636710400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8164 (or 8143 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 37.

The spelling of 64636710400 in words is "sixty-four billion, six hundred thirty-six million, seven hundred ten thousand, four hundred".