168377381081 has 16 divisors (see below), whose sum is σ = 214379692800. Its totient is φ = 128627811648.

The previous prime is 168377381071. The next prime is 168377381089. The reversal of 168377381081 is 180183773861.

It is not a de Polignac number, because 168377381081 - 2⁶ = 168377381017 is a prime.

It is a super-2 number, since 2×168377381081² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (168377381089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31899101 + ... + 31904378.

It is an arithmetic number, because the mean of its divisors is an integer number (13398730800).

Almost surely, 2^168377381081 is an apocalyptic number.

It is an amenable number.

168377381081 is a deficient number, since it is larger than the sum of its proper divisors (46002311719).

168377381081 is a wasteful number, since it uses less digits than its factorization.

168377381081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63803528.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The spelling of 168377381081 in words is "one hundred sixty-eight billion, three hundred seventy-seven million, three hundred eighty-one thousand, eighty-one".