2506943388913 has 2 divisors, whose sum is σ = 2506943388914. Its totient is φ = 2506943388912.

The previous prime is 2506943388871. The next prime is 2506943388931. The reversal of 2506943388913 is 3198833496052.

Together with next prime (2506943388931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2003889385744 + 503054003169 = 1415588^2 + 709263^2 .

It is a cyclic number.

It is not a de Polignac number, because 2506943388913 - 2⁹ = 2506943388401 is a prime.

It is not a weakly prime, because it can be changed into another prime (2506943385913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1253471694456 + 1253471694457.

It is an arithmetic number, because the mean of its divisors is an integer number (1253471694457).

Almost surely, 2^{2506943388913} is an apocalyptic number.

It is an amenable number.

2506943388913 is a deficient number, since it is larger than the sum of its proper divisors (1).

2506943388913 is an equidigital number, since it uses as much as digits as its factorization.

2506943388913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33592320, while the sum is 61.

The spelling of 2506943388913 in words is "two trillion, five hundred six billion, nine hundred forty-three million, three hundred eighty-eight thousand, nine hundred thirteen".