64044793647 has 48 divisors (see below), whose sum is σ = 98900287200. Its totient is φ = 39820999680.

The previous prime is 64044793633. The next prime is 64044793661. The reversal of 64044793647 is 74639744046.

It is an interprime number because it is at equal distance from previous prime (64044793633) and next prime (64044793661).

It is not a de Polignac number, because 64044793647 - 2⁸ = 64044793391 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 64044793593 and 64044793602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64044793627) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3536997 + ... + 3555057.

It is an arithmetic number, because the mean of its divisors is an integer number (2060422650).

Almost surely, 2^64044793647 is an apocalyptic number.

64044793647 is a deficient number, since it is larger than the sum of its proper divisors (34855493553).

64044793647 is a wasteful number, since it uses less digits than its factorization.

64044793647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18408 (or 18405 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 54.

The spelling of 64044793647 in words is "sixty-four billion, forty-four million, seven hundred ninety-three thousand, six hundred forty-seven".