25467879887 has 2 divisors, whose sum is σ = 25467879888. Its totient is φ = 25467879886.

The previous prime is 25467879839. The next prime is 25467879893. The reversal of 25467879887 is 78897876452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25467879887 - 2⁸ = 25467879631 is a prime.

It is a super-2 number, since 2×25467879887² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25467879887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25467872887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12733939943 + 12733939944.

It is an arithmetic number, because the mean of its divisors is an integer number (12733939944).

Almost surely, 2^25467879887 is an apocalyptic number.

25467879887 is a deficient number, since it is larger than the sum of its proper divisors (1).

25467879887 is an equidigital number, since it uses as much as digits as its factorization.

25467879887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 379330560, while the sum is 71.

The spelling of 25467879887 in words is "twenty-five billion, four hundred sixty-seven million, eight hundred seventy-nine thousand, eight hundred eighty-seven".