26505123461 has 2 divisors, whose sum is σ = 26505123462. Its totient is φ = 26505123460.

The previous prime is 26505123439. The next prime is 26505123499. The reversal of 26505123461 is 16432150562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17399192836 + 9105930625 = 131906^2 + 95425^2 .

It is a cyclic number.

It is not a de Polignac number, because 26505123461 - 2²⁶ = 26438014597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26505123401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13252561730 + 13252561731.

It is an arithmetic number, because the mean of its divisors is an integer number (13252561731).

Almost surely, 2^26505123461 is an apocalyptic number.

It is an amenable number.

26505123461 is a deficient number, since it is larger than the sum of its proper divisors (1).

26505123461 is an equidigital number, since it uses as much as digits as its factorization.

26505123461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 26505123461 in words is "twenty-six billion, five hundred five million, one hundred twenty-three thousand, four hundred sixty-one".