64501389812 has 12 divisors (see below), whose sum is σ = 115279080000. Its totient is φ = 31564509816.

The previous prime is 64501389781. The next prime is 64501389847. The reversal of 64501389812 is 21898310546.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 171546062 + ... + 171546437.

It is an arithmetic number, because the mean of its divisors is an integer number (9606590000).

Almost surely, 2^64501389812 is an apocalyptic number.

It is an amenable number.

64501389812 is a deficient number, since it is larger than the sum of its proper divisors (50777690188).

64501389812 is a wasteful number, since it uses less digits than its factorization.

64501389812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343092550 (or 343092548 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 64501389812 in words is "sixty-four billion, five hundred one million, three hundred eighty-nine thousand, eight hundred twelve".