168881206857 has 32 divisors (see below), whose sum is σ = 248887102464. Its totient is φ = 101008152000.

The previous prime is 168881206847. The next prime is 168881206909. The reversal of 168881206857 is 758602188861.

It is not a de Polignac number, because 168881206857 - 2⁷ = 168881206729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168881206857.

It is not an unprimeable number, because it can be changed into a prime (168881206847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 940708 + ... + 1105754.

It is an arithmetic number, because the mean of its divisors is an integer number (7777721952).

Almost surely, 2^168881206857 is an apocalyptic number.

It is an amenable number.

168881206857 is a deficient number, since it is larger than the sum of its proper divisors (80005895607).

168881206857 is a wasteful number, since it uses less digits than its factorization.

168881206857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165469.

The product of its (nonzero) digits is 10321920, while the sum is 60.

The spelling of 168881206857 in words is "one hundred sixty-eight billion, eight hundred eighty-one million, two hundred six thousand, eight hundred fifty-seven".