64750556420 has 48 divisors (see below), whose sum is σ = 157063390848. Its totient is φ = 22160616960.

The previous prime is 64750556417. The next prime is 64750556447. The reversal of 64750556420 is 2465505746.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8652752 + ... + 8660231.

It is an arithmetic number, because the mean of its divisors is an integer number (3272153976).

Almost surely, 2^64750556420 is an apocalyptic number.

It is an amenable number.

64750556420 is an abundant number, since it is smaller than the sum of its proper divisors (92312834428).

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

64750556420 is a wasteful number, since it uses less digits than its factorization.

64750556420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17313020 (or 17313018 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 44.

The spelling of 64750556420 in words is "sixty-four billion, seven hundred fifty million, five hundred fifty-six thousand, four hundred twenty".