64831885907 has 4 divisors (see below), whose sum is σ = 64835864856. Its totient is φ = 64827906960.

The previous prime is 64831885901. The next prime is 64831885949. The reversal of 64831885907 is 70958813846.

It is a happy number.

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 64831885907 - 2⁴ = 64831885891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64831885901) 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, 1964933 + ... + 1997654.

It is an arithmetic number, because the mean of its divisors is an integer number (16208966214).

Almost surely, 2^64831885907 is an apocalyptic number.

64831885907 is a deficient number, since it is larger than the sum of its proper divisors (3978949).

64831885907 is a wasteful number, since it uses less digits than its factorization.

64831885907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3978948.

The product of its (nonzero) digits is 11612160, while the sum is 59.

The spelling of 64831885907 in words is "sixty-four billion, eight hundred thirty-one million, eight hundred eighty-five thousand, nine hundred seven".