38956620665 has 8 divisors (see below), whose sum is σ = 46783995720. Its totient is φ = 31141262592.

The previous prime is 38956620653. The next prime is 38956620667. The reversal of 38956620665 is 56602665983.

It can be written as a sum of positive squares in 4 ways, for example, as 14324259856 + 24632360809 = 119684^2 + 156947^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38956620665 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38956620665.

It is not an unprimeable number, because it can be changed into a prime (38956620667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2997110 + ... + 3010079.

It is an arithmetic number, because the mean of its divisors is an integer number (5847999465).

Almost surely, 2^38956620665 is an apocalyptic number.

It is an amenable number.

38956620665 is a deficient number, since it is larger than the sum of its proper divisors (7827375055).

38956620665 is a wasteful number, since it uses less digits than its factorization.

38956620665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6008491.

The product of its (nonzero) digits is 13996800, while the sum is 56.

The spelling of 38956620665 in words is "thirty-eight billion, nine hundred fifty-six million, six hundred twenty thousand, six hundred sixty-five".