26623463957 has 2 divisors, whose sum is σ = 26623463958. Its totient is φ = 26623463956.

The previous prime is 26623463947. The next prime is 26623463959. The reversal of 26623463957 is 75936432662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26586606916 + 36857041 = 163054^2 + 6071^2 .

It is a cyclic number.

It is not a de Polignac number, because 26623463957 - 2¹² = 26623459861 is a prime.

Together with 26623463959, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 26623463899 and 26623463908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26623463959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13311731978 + 13311731979.

It is an arithmetic number, because the mean of its divisors is an integer number (13311731979).

Almost surely, 2^26623463957 is an apocalyptic number.

It is an amenable number.

26623463957 is a deficient number, since it is larger than the sum of its proper divisors (1).

26623463957 is an equidigital number, since it uses as much as digits as its factorization.

26623463957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9797760, while the sum is 53.

The spelling of 26623463957 in words is "twenty-six billion, six hundred twenty-three million, four hundred sixty-three thousand, nine hundred fifty-seven".