125555792591 has 2 divisors, whose sum is σ = 125555792592. Its totient is φ = 125555792590.

The previous prime is 125555792521. The next prime is 125555792641. The reversal of 125555792591 is 195297555521.

It is a strong prime.

It is an emirp because it is prime and its reverse (195297555521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125555792591 - 2¹⁴ = 125555776207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125555792521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62777896295 + 62777896296.

It is an arithmetic number, because the mean of its divisors is an integer number (62777896296).

Almost surely, 2^125555792591 is an apocalyptic number.

125555792591 is a deficient number, since it is larger than the sum of its proper divisors (1).

125555792591 is an equidigital number, since it uses as much as digits as its factorization.

125555792591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7087500, while the sum is 56.

The spelling of 125555792591 in words is "one hundred twenty-five billion, five hundred fifty-five million, seven hundred ninety-two thousand, five hundred ninety-one".