38531123857 has 4 divisors (see below), whose sum is σ = 38928352036. Its totient is φ = 38133895680.

The previous prime is 38531123833. The next prime is 38531123881. The reversal of 38531123857 is 75832113583.

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

It is an interprime number because it is at equal distance from previous prime (38531123833) and next prime (38531123881).

It can be written as a sum of positive squares in 2 ways, for example, as 8828669521 + 29702454336 = 93961^2 + 172344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38531123857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38538123857) 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, 198613944 + ... + 198614137.

It is an arithmetic number, because the mean of its divisors is an integer number (9732088009).

Almost surely, 2^38531123857 is an apocalyptic number.

It is an amenable number.

38531123857 is a deficient number, since it is larger than the sum of its proper divisors (397228179).

38531123857 is an equidigital number, since it uses as much as digits as its factorization.

38531123857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397228178.

The product of its digits is 604800, while the sum is 46.

The spelling of 38531123857 in words is "thirty-eight billion, five hundred thirty-one million, one hundred twenty-three thousand, eight hundred fifty-seven".