38536646847557 has 4 divisors (see below), whose sum is σ = 39356575503936. Its totient is φ = 37716718191180.

The previous prime is 38536646847547. The next prime is 38536646847599. The reversal of 38536646847557 is 75574864663583.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38536646847557 - 2²² = 38536642653253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38536646847547) 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, 409964328119 + ... + 409964328212.

It is an arithmetic number, because the mean of its divisors is an integer number (9839143875984).

Almost surely, 2^{38536646847557} is an apocalyptic number.

It is an amenable number.

38536646847557 is a deficient number, since it is larger than the sum of its proper divisors (819928656379).

38536646847557 is an equidigital number, since it uses as much as digits as its factorization.

38536646847557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819928656378.

The product of its digits is 12192768000, while the sum is 77.

The spelling of 38536646847557 in words is "thirty-eight trillion, five hundred thirty-six billion, six hundred forty-six million, eight hundred forty-seven thousand, five hundred fifty-seven".