38168436681 has 64 divisors (see below), whose sum is σ = 61877260800. Its totient is φ = 23177290752.

The previous prime is 38168436679. The next prime is 38168436701. The reversal of 38168436681 is 18663486183.

It is not a de Polignac number, because 38168436681 - 2¹ = 38168436679 is a prime.

It is a super-2 number, since 2×38168436681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38168436661) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1300141 + ... + 1329173.

It is an arithmetic number, because the mean of its divisors is an integer number (966832200).

Almost surely, 2^38168436681 is an apocalyptic number.

It is an amenable number.

38168436681 is a deficient number, since it is larger than the sum of its proper divisors (23708824119).

38168436681 is a wasteful number, since it uses less digits than its factorization.

38168436681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29167 (or 29161 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The spelling of 38168436681 in words is "thirty-eight billion, one hundred sixty-eight million, four hundred thirty-six thousand, six hundred eighty-one".