25421697913219 has 2 divisors, whose sum is σ = 25421697913220. Its totient is φ = 25421697913218.

The previous prime is 25421697913177. The next prime is 25421697913231. The reversal of 25421697913219 is 91231979612452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25421697913219 - 2²⁹ = 25421161042307 is a prime.

It is a super-2 number, since 2×25421697913219² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25421697913019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12710848956609 + 12710848956610.

It is an arithmetic number, because the mean of its divisors is an integer number (12710848956610).

Almost surely, 2^{25421697913219} is an apocalyptic number.

25421697913219 is a deficient number, since it is larger than the sum of its proper divisors (1).

25421697913219 is an equidigital number, since it uses as much as digits as its factorization.

25421697913219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14696640, while the sum is 61.

The spelling of 25421697913219 in words is "twenty-five trillion, four hundred twenty-one billion, six hundred ninety-seven million, nine hundred thirteen thousand, two hundred nineteen".