26363778013 has 2 divisors, whose sum is σ = 26363778014. Its totient is φ = 26363778012.

The previous prime is 26363777983. The next prime is 26363778053. The reversal of 26363778013 is 31087736362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19287098884 + 7076679129 = 138878^2 + 84123^2 .

It is a cyclic number.

It is not a de Polignac number, because 26363778013 - 2²¹ = 26361680861 is a prime.

It is a super-2 number, since 2×26363778013² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26363778053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13181889006 + 13181889007.

It is an arithmetic number, because the mean of its divisors is an integer number (13181889007).

Almost surely, 2^26363778013 is an apocalyptic number.

It is an amenable number.

26363778013 is a deficient number, since it is larger than the sum of its proper divisors (1).

26363778013 is an equidigital number, since it uses as much as digits as its factorization.

26363778013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 46.

The spelling of 26363778013 in words is "twenty-six billion, three hundred sixty-three million, seven hundred seventy-eight thousand, thirteen".