26257363939 has 2 divisors, whose sum is σ = 26257363940. Its totient is φ = 26257363938.

The previous prime is 26257363903. The next prime is 26257363963. The reversal of 26257363939 is 93936375262.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26257363939 - 2¹¹ = 26257361891 is a prime.

It is a super-2 number, since 2×26257363939² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26257363939.

It is not a weakly prime, because it can be changed into another prime (26257363999) 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 as a sum of consecutive naturals, namely, 13128681969 + 13128681970.

It is an arithmetic number, because the mean of its divisors is an integer number (13128681970).

Almost surely, 2^26257363939 is an apocalyptic number.

26257363939 is a deficient number, since it is larger than the sum of its proper divisors (1).

26257363939 is an equidigital number, since it uses as much as digits as its factorization.

26257363939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11022480, while the sum is 55.

The spelling of 26257363939 in words is "twenty-six billion, two hundred fifty-seven million, three hundred sixty-three thousand, nine hundred thirty-nine".