2538664791 has 32 divisors (see below), whose sum is σ = 3863946240. Its totient is φ = 1468737024.

The previous prime is 2538664787. The next prime is 2538664811. The reversal of 2538664791 is 1974668352.

It is not a de Polignac number, because 2538664791 - 2² = 2538664787 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2538664591) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 873046 + ... + 875948.

It is an arithmetic number, because the mean of its divisors is an integer number (120748320).

Almost surely, 2^2538664791 is an apocalyptic number.

2538664791 is a deficient number, since it is larger than the sum of its proper divisors (1325281449).

2538664791 is a wasteful number, since it uses less digits than its factorization.

2538664791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4255.

The product of its digits is 2177280, while the sum is 51.

The square root of 2538664791 is about 50385.1643938967. The cubic root of 2538664791 is about 1364.1698702777.

The spelling of 2538664791 in words is "two billion, five hundred thirty-eight million, six hundred sixty-four thousand, seven hundred ninety-one".