64356687683 has 4 divisors (see below), whose sum is σ = 66575883840. Its totient is φ = 62137491528.

The previous prime is 64356687601. The next prime is 64356687701. The reversal of 64356687683 is 38678665346.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64356687683 - 2¹⁶ = 64356622147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64356687583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1109598035 + ... + 1109598092.

It is an arithmetic number, because the mean of its divisors is an integer number (16643970960).

Almost surely, 2^64356687683 is an apocalyptic number.

64356687683 is a deficient number, since it is larger than the sum of its proper divisors (2219196157).

64356687683 is a wasteful number, since it uses less digits than its factorization.

64356687683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219196156.

The product of its digits is 104509440, while the sum is 62.

The spelling of 64356687683 in words is "sixty-four billion, three hundred fifty-six million, six hundred eighty-seven thousand, six hundred eighty-three".