168820870492 has 12 divisors (see below), whose sum is σ = 304966734016. Its totient is φ = 81687517920.

The previous prime is 168820870447. The next prime is 168820870507. The reversal of 168820870492 is 294078028861.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680729193 + ... + 680729440.

Almost surely, 2^168820870492 is an apocalyptic number.

It is an amenable number.

168820870492 is a deficient number, since it is larger than the sum of its proper divisors (136145863524).

168820870492 is a wasteful number, since it uses less digits than its factorization.

168820870492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361458668 (or 1361458666 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 55.

The spelling of 168820870492 in words is "one hundred sixty-eight billion, eight hundred twenty million, eight hundred seventy thousand, four hundred ninety-two".