168207892578 has 48 divisors (see below), whose sum is σ = 399318566400. Its totient is φ = 50749489440.

The previous prime is 168207892549. The next prime is 168207892597. The reversal of 168207892578 is 875298702861.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

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 23 ways as a sum of consecutive naturals, for example, 1809538 + ... + 1900221.

It is an arithmetic number, because the mean of its divisors is an integer number (8319136800).

Almost surely, 2^168207892578 is an apocalyptic number.

168207892578 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

168207892578 is an abundant number, since it is smaller than the sum of its proper divisors (231110673822).

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

168207892578 is a wasteful number, since it uses less digits than its factorization.

168207892578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3710007 (or 3710004 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 63.

The spelling of 168207892578 in words is "one hundred sixty-eight billion, two hundred seven million, eight hundred ninety-two thousand, five hundred seventy-eight".