25121041591 has 2 divisors, whose sum is σ = 25121041592. Its totient is φ = 25121041590.

The previous prime is 25121041529. The next prime is 25121041607. The reversal of 25121041591 is 19514012152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25121041591 - 2¹¹ = 25121039543 is a prime.

It is a super-2 number, since 2×25121041591² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25121041511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12560520795 + 12560520796.

It is an arithmetic number, because the mean of its divisors is an integer number (12560520796).

Almost surely, 2^25121041591 is an apocalyptic number.

25121041591 is a deficient number, since it is larger than the sum of its proper divisors (1).

25121041591 is an equidigital number, since it uses as much as digits as its factorization.

25121041591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 31.

The spelling of 25121041591 in words is "twenty-five billion, one hundred twenty-one million, forty-one thousand, five hundred ninety-one".