64942612644 has 96 divisors (see below), whose sum is σ = 192933054720. Its totient is φ = 16537102848.

The previous prime is 64942612621. The next prime is 64942612649. The reversal of 64942612644 is 44621624946.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 64942612593 and 64942612602.

It is not an unprimeable number, because it can be changed into a prime (64942612649) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 993699 + ... + 1057034.

It is an arithmetic number, because the mean of its divisors is an integer number (2009719320).

Almost surely, 2^64942612644 is an apocalyptic number.

It is an amenable number.

64942612644 is an abundant number, since it is smaller than the sum of its proper divisors (127990442076).

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

64942612644 is a wasteful number, since it uses less digits than its factorization.

64942612644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050789 (or 2050787 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 48.

The spelling of 64942612644 in words is "sixty-four billion, nine hundred forty-two million, six hundred twelve thousand, six hundred forty-four".