2536781631 has 4 divisors (see below), whose sum is σ = 3382375512. Its totient is φ = 1691187752.

The previous prime is 2536781629. The next prime is 2536781651. The reversal of 2536781631 is 1361876352.

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

It is a cyclic number.

It is not a de Polignac number, because 2536781631 - 2¹ = 2536781629 is a prime.

It is a super-2 number, since 2×2536781631² = 12870522086758040322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2536781651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422796936 + ... + 422796941.

It is an arithmetic number, because the mean of its divisors is an integer number (845593878).

Almost surely, 2^2536781631 is an apocalyptic number.

2536781631 is a deficient number, since it is larger than the sum of its proper divisors (845593881).

2536781631 is an equidigital number, since it uses as much as digits as its factorization.

2536781631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845593880.

The product of its digits is 181440, while the sum is 42.

The square root of 2536781631 is about 50366.4732833261. The cubic root of 2536781631 is about 1363.8324769608.

The spelling of 2536781631 in words is "two billion, five hundred thirty-six million, seven hundred eighty-one thousand, six hundred thirty-one".