64263747957 has 16 divisors (see below), whose sum is σ = 85898921472. Its totient is φ = 42735664880.

The previous prime is 64263747943. The next prime is 64263747959. The reversal of 64263747957 is 75974736246.

It is a cyclic number.

It is not a de Polignac number, because 64263747957 - 2¹⁰ = 64263746933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64263747957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64263747959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2102458 + ... + 2132804.

It is an arithmetic number, because the mean of its divisors is an integer number (5368682592).

Almost surely, 2^64263747957 is an apocalyptic number.

It is an amenable number.

64263747957 is a deficient number, since it is larger than the sum of its proper divisors (21635173515).

64263747957 is a wasteful number, since it uses less digits than its factorization.

64263747957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32088.

The product of its digits is 53343360, while the sum is 60.

The spelling of 64263747957 in words is "sixty-four billion, two hundred sixty-three million, seven hundred forty-seven thousand, nine hundred fifty-seven".