64446644684 has 48 divisors (see below), whose sum is σ = 116117064000. Its totient is φ = 31284854016.

The previous prime is 64446644623. The next prime is 64446644707. The reversal of 64446644684 is 48644664446.

It is a super-2 number, since 2×64446644684² (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 15 ways as a sum of consecutive naturals, for example, 8103542 + ... + 8111490.

It is an arithmetic number, because the mean of its divisors is an integer number (2419105500).

Almost surely, 2^64446644684 is an apocalyptic number.

It is an amenable number.

64446644684 is a deficient number, since it is larger than the sum of its proper divisors (51670419316).

64446644684 is a wasteful number, since it uses less digits than its factorization.

64446644684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8402 (or 8400 counting only the distinct ones).

The product of its digits is 42467328, while the sum is 56.

The spelling of 64446644684 in words is "sixty-four billion, four hundred forty-six million, six hundred forty-four thousand, six hundred eighty-four".