26971514957 has 2 divisors, whose sum is σ = 26971514958. Its totient is φ = 26971514956.

The previous prime is 26971514897. The next prime is 26971515031. The reversal of 26971514957 is 75941517962.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26953102276 + 18412681 = 164174^2 + 4291^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26971514957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26971510957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13485757478 + 13485757479.

It is an arithmetic number, because the mean of its divisors is an integer number (13485757479).

Almost surely, 2^26971514957 is an apocalyptic number.

It is an amenable number.

26971514957 is a deficient number, since it is larger than the sum of its proper divisors (1).

26971514957 is an equidigital number, since it uses as much as digits as its factorization.

26971514957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4762800, while the sum is 56.

The spelling of 26971514957 in words is "twenty-six billion, nine hundred seventy-one million, five hundred fourteen thousand, nine hundred fifty-seven".