168821900200755 has 12 divisors (see below), whose sum is σ = 292624627014720. Its totient is φ = 90038346773712.

The previous prime is 168821900200747. The next prime is 168821900200769. The reversal of 168821900200755 is 557002009128861.

It is not a de Polignac number, because 168821900200755 - 2³ = 168821900200747 is a prime.

It is a super-2 number, since 2×168821900200755² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1875798891075 + ... + 1875798891164.

It is an arithmetic number, because the mean of its divisors is an integer number (24385385584560).

Almost surely, 2^{168821900200755} is an apocalyptic number.

168821900200755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

168821900200755 is a deficient number, since it is larger than the sum of its proper divisors (123802726813965).

168821900200755 is a wasteful number, since it uses less digits than its factorization.

168821900200755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3751597782250 (or 3751597782247 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 54.

The spelling of 168821900200755 in words is "one hundred sixty-eight trillion, eight hundred twenty-one billion, nine hundred million, two hundred thousand, seven hundred fifty-five".