2518136891 has 2 divisors, whose sum is σ = 2518136892. Its totient is φ = 2518136890.

The previous prime is 2518136879. The next prime is 2518136909. The reversal of 2518136891 is 1986318152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2518136891 - 2¹⁸ = 2517874747 is a prime.

It is not a weakly prime, because it can be changed into another prime (2518136191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1259068445 + 1259068446.

It is an arithmetic number, because the mean of its divisors is an integer number (1259068446).

Almost surely, 2^2518136891 is an apocalyptic number.

2518136891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2518136891 is an equidigital number, since it uses as much as digits as its factorization.

2518136891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 44.

The square root of 2518136891 is about 50181.0411510164. The cubic root of 2518136891 is about 1360.4829763483.

The spelling of 2518136891 in words is "two billion, five hundred eighteen million, one hundred thirty-six thousand, eight hundred ninety-one".