64044590660 has 24 divisors (see below), whose sum is σ = 140341190976. Its totient is φ = 24504017120.

The previous prime is 64044590641. The next prime is 64044590677. The reversal of 64044590660 is 6609544046.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69613226 + ... + 69614145.

It is an arithmetic number, because the mean of its divisors is an integer number (5847549624).

Almost surely, 2^64044590660 is an apocalyptic number.

It is an amenable number.

64044590660 is an abundant number, since it is smaller than the sum of its proper divisors (76296600316).

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

64044590660 is a wasteful number, since it uses less digits than its factorization.

64044590660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139227403 (or 139227401 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 64044590660 in words is "sixty-four billion, forty-four million, five hundred ninety thousand, six hundred sixty".