25597757219 has 2 divisors, whose sum is σ = 25597757220. Its totient is φ = 25597757218.

The previous prime is 25597757189. The next prime is 25597757231. The reversal of 25597757219 is 91275779552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25597757219 is a prime.

It is a super-2 number, since 2×25597757219² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25597757279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12798878609 + 12798878610.

It is an arithmetic number, because the mean of its divisors is an integer number (12798878610).

Almost surely, 2^25597757219 is an apocalyptic number.

25597757219 is a deficient number, since it is larger than the sum of its proper divisors (1).

25597757219 is an equidigital number, since it uses as much as digits as its factorization.

25597757219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13891500, while the sum is 59.

The spelling of 25597757219 in words is "twenty-five billion, five hundred ninety-seven million, seven hundred fifty-seven thousand, two hundred nineteen".