842172664 has 16 divisors (see below), whose sum is σ = 1579503600. Its totient is φ = 420971712.

The previous prime is 842172659. The next prime is 842172679. The reversal of 842172664 is 466271248.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22452 + ... + 46780.

It is an arithmetic number, because the mean of its divisors is an integer number (98718975).

Almost surely, 2^842172664 is an apocalyptic number.

It is an amenable number.

842172664 is a deficient number, since it is larger than the sum of its proper divisors (737330936).

842172664 is a wasteful number, since it uses less digits than its factorization.

842172664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28662 (or 28658 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 842172664 is about 29020.2113017807. The cubic root of 842172664 is about 944.3515849012.

The spelling of 842172664 in words is "eight hundred forty-two million, one hundred seventy-two thousand, six hundred sixty-four".