64798617600 has 624 divisors, whose sum is σ = 248639443200. Its totient is φ = 16512122880.

The previous prime is 64798617563. The next prime is 64798617601. The reversal of 64798617600 is 671689746.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64798617601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 63589891 + ... + 63590909.

Almost surely, 2^64798617600 is an apocalyptic number.

64798617600 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 64798617600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124319721600).

64798617600 is an abundant number, since it is smaller than the sum of its proper divisors (183840825600).

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

64798617600 is a wasteful number, since it uses less digits than its factorization.

64798617600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085 (or 1052 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 64798617600 in words is "sixty-four billion, seven hundred ninety-eight million, six hundred seventeen thousand, six hundred".