64180297984 has 72 divisors (see below), whose sum is σ = 140050955520. Its totient is φ = 29111347200.

The previous prime is 64180297933. The next prime is 64180298003. The reversal of 64180297984 is 48979208146.

It is a super-2 number, since 2×64180297984² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1325074 + ... + 1372654.

It is an arithmetic number, because the mean of its divisors is an integer number (1945152160).

Almost surely, 2^64180297984 is an apocalyptic number.

64180297984 is a gapful number since it is divisible by the number (64) 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 64180297984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70025477760).

64180297984 is an abundant number, since it is smaller than the sum of its proper divisors (75870657536).

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

64180297984 is a wasteful number, since it uses less digits than its factorization.

64180297984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48087 (or 48073 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 58.

The spelling of 64180297984 in words is "sixty-four billion, one hundred eighty million, two hundred ninety-seven thousand, nine hundred eighty-four".