2538768361931 has 4 divisors (see below), whose sum is σ = 2539077636600. Its totient is φ = 2538459087264.

The previous prime is 2538768361907. The next prime is 2538768361933. The reversal of 2538768361931 is 1391638678352.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2538768361931 is a prime.

It is a super-2 number, since 2×2538768361931² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2538768361933) 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, 154625021 + ... + 154641438.

It is an arithmetic number, because the mean of its divisors is an integer number (634769409150).

Almost surely, 2^{2538768361931} is an apocalyptic number.

2538768361931 is a deficient number, since it is larger than the sum of its proper divisors (309274669).

2538768361931 is an equidigital number, since it uses as much as digits as its factorization.

2538768361931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309274668.

The product of its digits is 39191040, while the sum is 62.

The spelling of 2538768361931 in words is "two trillion, five hundred thirty-eight billion, seven hundred sixty-eight million, three hundred sixty-one thousand, nine hundred thirty-one".