38195117857 has 4 divisors (see below), whose sum is σ = 41133203860. Its totient is φ = 35257031856.

The previous prime is 38195117819. The next prime is 38195117879. The reversal of 38195117857 is 75871159183.

38195117857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22205768256 + 15989349601 = 149016^2 + 126449^2 .

It is a cyclic number.

It is not a de Polignac number, because 38195117857 - 2⁷ = 38195117729 is a prime.

It is a super-2 number, since 2×38195117857² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38195117798 and 38195117807.

It is not an unprimeable number, because it can be changed into a prime (38195147857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1469042982 + ... + 1469043007.

It is an arithmetic number, because the mean of its divisors is an integer number (10283300965).

Almost surely, 2^38195117857 is an apocalyptic number.

It is an amenable number.

38195117857 is a deficient number, since it is larger than the sum of its proper divisors (2938086003).

38195117857 is a wasteful number, since it uses less digits than its factorization.

38195117857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2938086002.

The product of its digits is 2116800, while the sum is 55.

The spelling of 38195117857 in words is "thirty-eight billion, one hundred ninety-five million, one hundred seventeen thousand, eight hundred fifty-seven".