38318822661 has 24 divisors (see below), whose sum is σ = 59479255584. Its totient is φ = 21879530400.

The previous prime is 38318822657. The next prime is 38318822693. The reversal of 38318822661 is 16622881383.

It is not a de Polignac number, because 38318822661 - 2² = 38318822657 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 38318822661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38318822621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91066 + ... + 291428.

It is an arithmetic number, because the mean of its divisors is an integer number (2478302316).

Almost surely, 2^38318822661 is an apocalyptic number.

It is an amenable number.

38318822661 is a deficient number, since it is larger than the sum of its proper divisors (21160432923).

38318822661 is a wasteful number, since it uses less digits than its factorization.

38318822661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201681 (or 201674 counting only the distinct ones).

The product of its digits is 663552, while the sum is 48.

The spelling of 38318822661 in words is "thirty-eight billion, three hundred eighteen million, eight hundred twenty-two thousand, six hundred sixty-one".