168755421331 has 32 divisors (see below), whose sum is σ = 195163914240. Its totient is φ = 142936231200.

The previous prime is 168755421229. The next prime is 168755421371. The reversal of 168755421331 is 133124557861.

It is not a de Polignac number, because 168755421331 - 2¹⁹ = 168754897043 is a prime.

It is a super-2 number, since 2×168755421331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168755421371) 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, 163680786 + ... + 163681816.

It is an arithmetic number, because the mean of its divisors is an integer number (6098872320).

Almost surely, 2^168755421331 is an apocalyptic number.

168755421331 is a deficient number, since it is larger than the sum of its proper divisors (26408492909).

168755421331 is a wasteful number, since it uses less digits than its factorization.

168755421331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1935.

The product of its digits is 604800, while the sum is 46.

The spelling of 168755421331 in words is "one hundred sixty-eight billion, seven hundred fifty-five million, four hundred twenty-one thousand, three hundred thirty-one".