25346835989 has 2 divisors, whose sum is σ = 25346835990. Its totient is φ = 25346835988.

The previous prime is 25346835953. The next prime is 25346836003. The reversal of 25346835989 is 98953864352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24635813764 + 711022225 = 156958^2 + 26665^2 .

It is a cyclic number.

It is not a de Polignac number, because 25346835989 - 2²⁰ = 25345787413 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25346835929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12673417994 + 12673417995.

It is an arithmetic number, because the mean of its divisors is an integer number (12673417995).

Almost surely, 2^25346835989 is an apocalyptic number.

It is an amenable number.

25346835989 is a deficient number, since it is larger than the sum of its proper divisors (1).

25346835989 is an equidigital number, since it uses as much as digits as its factorization.

25346835989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55987200, while the sum is 62.

The spelling of 25346835989 in words is "twenty-five billion, three hundred forty-six million, eight hundred thirty-five thousand, nine hundred eighty-nine".