26013432257 has 2 divisors, whose sum is σ = 26013432258. Its totient is φ = 26013432256.

The previous prime is 26013432253. The next prime is 26013432311. The reversal of 26013432257 is 75223431062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25678139536 + 335292721 = 160244^2 + 18311^2 .

It is a cyclic number.

It is not a de Polignac number, because 26013432257 - 2² = 26013432253 is a prime.

It is a super-2 number, since 2×26013432257² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26013432253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13006716128 + 13006716129.

It is an arithmetic number, because the mean of its divisors is an integer number (13006716129).

Almost surely, 2^26013432257 is an apocalyptic number.

It is an amenable number.

26013432257 is a deficient number, since it is larger than the sum of its proper divisors (1).

26013432257 is an equidigital number, since it uses as much as digits as its factorization.

26013432257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 35.

The spelling of 26013432257 in words is "twenty-six billion, thirteen million, four hundred thirty-two thousand, two hundred fifty-seven".