26125571497 has 2 divisors, whose sum is σ = 26125571498. Its totient is φ = 26125571496.

The previous prime is 26125571471. The next prime is 26125571531. The reversal of 26125571497 is 79417552162.

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., 24954836841 + 1170734656 = 157971^2 + 34216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26125571497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26125571497.

It is not a weakly prime, because it can be changed into another prime (26125572497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13062785748 + 13062785749.

It is an arithmetic number, because the mean of its divisors is an integer number (13062785749).

Almost surely, 2^26125571497 is an apocalyptic number.

It is an amenable number.

26125571497 is a deficient number, since it is larger than the sum of its proper divisors (1).

26125571497 is an equidigital number, since it uses as much as digits as its factorization.

26125571497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058400, while the sum is 49.

The spelling of 26125571497 in words is "twenty-six billion, one hundred twenty-five million, five hundred seventy-one thousand, four hundred ninety-seven".