26617545457 has 2 divisors, whose sum is σ = 26617545458. Its totient is φ = 26617545456.

The previous prime is 26617545443. The next prime is 26617545499. The reversal of 26617545457 is 75454571662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15077629681 + 11539915776 = 122791^2 + 107424^2 .

It is a cyclic number.

It is not a de Polignac number, because 26617545457 - 2³¹ = 24470061809 is a prime.

It is a super-2 number, since 2×26617545457² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26617545257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13308772728 + 13308772729.

It is an arithmetic number, because the mean of its divisors is an integer number (13308772729).

Almost surely, 2^26617545457 is an apocalyptic number.

It is an amenable number.

26617545457 is a deficient number, since it is larger than the sum of its proper divisors (1).

26617545457 is an equidigital number, since it uses as much as digits as its factorization.

26617545457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056000, while the sum is 52.

The spelling of 26617545457 in words is "twenty-six billion, six hundred seventeen million, five hundred forty-five thousand, four hundred fifty-seven".