26943634957 has 2 divisors, whose sum is σ = 26943634958. Its totient is φ = 26943634956.

The previous prime is 26943634859. The next prime is 26943634973. The reversal of 26943634957 is 75943634962.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26793106596 + 150528361 = 163686^2 + 12269^2 .

It is a cyclic number.

It is not a de Polignac number, because 26943634957 - 2⁷ = 26943634829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26943638957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13471817478 + 13471817479.

It is an arithmetic number, because the mean of its divisors is an integer number (13471817479).

Almost surely, 2^26943634957 is an apocalyptic number.

It is an amenable number.

26943634957 is a deficient number, since it is larger than the sum of its proper divisors (1).

26943634957 is an equidigital number, since it uses as much as digits as its factorization.

26943634957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29393280, while the sum is 58.

The spelling of 26943634957 in words is "twenty-six billion, nine hundred forty-three million, six hundred thirty-four thousand, nine hundred fifty-seven".