64505038080 has 576 divisors, whose sum is σ = 244887552000. Its totient is φ = 14160199680.

The previous prime is 64505038063. The next prime is 64505038097. The reversal of 64505038080 is 8083050546.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64505038063) and next prime (64505038097).

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 165822526 + ... + 165822914.

It is an arithmetic number, because the mean of its divisors is an integer number (425152000).

Almost surely, 2^64505038080 is an apocalyptic number.

64505038080 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 64505038080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122443776000).

64505038080 is an abundant number, since it is smaller than the sum of its proper divisors (180382513920).

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

64505038080 is a wasteful number, since it uses less digits than its factorization.

64505038080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 636 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

The spelling of 64505038080 in words is "sixty-four billion, five hundred five million, thirty-eight thousand, eighty".