664192171192 has 16 divisors (see below), whose sum is σ = 1358574895800. Its totient is φ = 301905532320.

The previous prime is 664192171147. The next prime is 664192171213. The reversal of 664192171192 is 291171291466.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 3773819067 + ... + 3773819242.

Almost surely, 2^664192171192 is an apocalyptic number.

It is an amenable number.

664192171192 is an abundant number, since it is smaller than the sum of its proper divisors (694382724608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664192171192 is a wasteful number, since it uses less digits than its factorization.

664192171192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7547638326 (or 7547638322 counting only the distinct ones).

The product of its digits is 326592, while the sum is 49.

The spelling of 664192171192 in words is "six hundred sixty-four billion, one hundred ninety-two million, one hundred seventy-one thousand, one hundred ninety-two".