26127591197 has 2 divisors, whose sum is σ = 26127591198. Its totient is φ = 26127591196.

The previous prime is 26127591109. The next prime is 26127591223. The reversal of 26127591197 is 79119572162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17733183556 + 8394407641 = 133166^2 + 91621^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26127591197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26127591097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13063795598 + 13063795599.

It is an arithmetic number, because the mean of its divisors is an integer number (13063795599).

Almost surely, 2^26127591197 is an apocalyptic number.

It is an amenable number.

26127591197 is a deficient number, since it is larger than the sum of its proper divisors (1).

26127591197 is an equidigital number, since it uses as much as digits as its factorization.

26127591197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 50.

The spelling of 26127591197 in words is "twenty-six billion, one hundred twenty-seven million, five hundred ninety-one thousand, one hundred ninety-seven".