26604515057 has 2 divisors, whose sum is σ = 26604515058. Its totient is φ = 26604515056.

The previous prime is 26604514987. The next prime is 26604515123. The reversal of 26604515057 is 75051540662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26122317376 + 482197681 = 161624^2 + 21959^2 .

It is a cyclic number.

It is not a de Polignac number, because 26604515057 - 2¹⁴ = 26604498673 is a prime.

It is not a weakly prime, because it can be changed into another prime (26604515657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13302257528 + 13302257529.

It is an arithmetic number, because the mean of its divisors is an integer number (13302257529).

Almost surely, 2^26604515057 is an apocalyptic number.

It is an amenable number.

26604515057 is a deficient number, since it is larger than the sum of its proper divisors (1).

26604515057 is an equidigital number, since it uses as much as digits as its factorization.

26604515057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 26604515057 in words is "twenty-six billion, six hundred four million, five hundred fifteen thousand, fifty-seven".