64170861475 has 12 divisors (see below), whose sum is σ = 90939278224. Its totient is φ = 44002876320.

The previous prime is 64170861457. The next prime is 64170861487. The reversal of 64170861475 is 57416807146.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-64170861475 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 183345144 + ... + 183345493.

Almost surely, 2^64170861475 is an apocalyptic number.

64170861475 is a deficient number, since it is larger than the sum of its proper divisors (26768416749).

64170861475 is a wasteful number, since it uses less digits than its factorization.

64170861475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366690654 (or 366690649 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 64170861475 in words is "sixty-four billion, one hundred seventy million, eight hundred sixty-one thousand, four hundred seventy-five".