26778752875531 has 2 divisors, whose sum is σ = 26778752875532. Its totient is φ = 26778752875530.

The previous prime is 26778752875487. The next prime is 26778752875543. The reversal of 26778752875531 is 13557825787762.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26778752875531 - 2⁹ = 26778752875019 is a prime.

It is a super-2 number, since 2×26778752875531² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26778752875591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13389376437765 + 13389376437766.

It is an arithmetic number, because the mean of its divisors is an integer number (13389376437766).

Almost surely, 2^{26778752875531} is an apocalyptic number.

26778752875531 is a deficient number, since it is larger than the sum of its proper divisors (1).

26778752875531 is an equidigital number, since it uses as much as digits as its factorization.

26778752875531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1382976000, while the sum is 73.

The spelling of 26778752875531 in words is "twenty-six trillion, seven hundred seventy-eight billion, seven hundred fifty-two million, eight hundred seventy-five thousand, five hundred thirty-one".