64645244556 has 36 divisors (see below), whose sum is σ = 156219626472. Its totient is φ = 20805362816.

The previous prime is 64645244533. The next prime is 64645244557. The reversal of 64645244556 is 65544254646.

It is a junction number, because it is equal to n+sod(n) for n = 64645244499 and 64645244508.

It is not an unprimeable number, because it can be changed into a prime (64645244557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3192705 + ... + 3212888.

Almost surely, 2^64645244556 is an apocalyptic number.

It is an amenable number.

64645244556 is an abundant number, since it is smaller than the sum of its proper divisors (91574381916).

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

64645244556 is a wasteful number, since it uses less digits than its factorization.

64645244556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6405658 (or 6405627 counting only the distinct ones).

The product of its digits is 13824000, while the sum is 51.

The spelling of 64645244556 in words is "sixty-four billion, six hundred forty-five million, two hundred forty-four thousand, five hundred fifty-six".