25907924489 has 2 divisors, whose sum is σ = 25907924490. Its totient is φ = 25907924488.

The previous prime is 25907924443. The next prime is 25907924501. The reversal of 25907924489 is 98442970952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14416084489 + 11491840000 = 120067^2 + 107200^2 .

It is a cyclic number.

It is not a de Polignac number, because 25907924489 - 2¹⁶ = 25907858953 is a prime.

It is a super-2 number, since 2×25907924489² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25907974489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12953962244 + 12953962245.

It is an arithmetic number, because the mean of its divisors is an integer number (12953962245).

Almost surely, 2^25907924489 is an apocalyptic number.

It is an amenable number.

25907924489 is a deficient number, since it is larger than the sum of its proper divisors (1).

25907924489 is an equidigital number, since it uses as much as digits as its factorization.

25907924489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The spelling of 25907924489 in words is "twenty-five billion, nine hundred seven million, nine hundred twenty-four thousand, four hundred eighty-nine".