168961504077 has 24 divisors (see below), whose sum is σ = 245063991744. Its totient is φ = 112175832384.

The previous prime is 168961504057. The next prime is 168961504091. The reversal of 168961504077 is 770405169861.

168961504077 is a `hidden beast` number, since 1 + 6 + 8 + 9 + 61 + 504 + 0 + 77 = 666.

It is not a de Polignac number, because 168961504077 - 2³² = 164666536781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168961504057) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 8494698 + ... + 8514564.

It is an arithmetic number, because the mean of its divisors is an integer number (10210999656).

Almost surely, 2^168961504077 is an apocalyptic number.

It is an amenable number.

168961504077 is a deficient number, since it is larger than the sum of its proper divisors (76102487667).

168961504077 is a wasteful number, since it uses less digits than its factorization.

168961504077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23729 (or 23726 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The spelling of 168961504077 in words is "one hundred sixty-eight billion, nine hundred sixty-one million, five hundred four thousand, seventy-seven".