64608669871 has 32 divisors (see below), whose sum is σ = 71856046080. Its totient is φ = 57849292800.

The previous prime is 64608669793. The next prime is 64608669877. The reversal of 64608669871 is 17896680646.

It is a cyclic number.

It is not a de Polignac number, because 64608669871 - 2⁷ = 64608669743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64608669877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6956751 + ... + 6966031.

It is an arithmetic number, because the mean of its divisors is an integer number (2245501440).

Almost surely, 2^64608669871 is an apocalyptic number.

64608669871 is a deficient number, since it is larger than the sum of its proper divisors (7247376209).

64608669871 is a wasteful number, since it uses less digits than its factorization.

64608669871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9607.

The product of its (nonzero) digits is 20901888, while the sum is 61.

The spelling of 64608669871 in words is "sixty-four billion, six hundred eight million, six hundred sixty-nine thousand, eight hundred seventy-one".