25254949849 has 4 divisors (see below), whose sum is σ = 25610653440. Its totient is φ = 24899246260.

The previous prime is 25254949817. The next prime is 25254949859. The reversal of 25254949849 is 94894945252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25254949849 - 2⁵ = 25254949817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25254949859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177851689 + ... + 177851830.

It is an arithmetic number, because the mean of its divisors is an integer number (6402663360).

Almost surely, 2^25254949849 is an apocalyptic number.

It is an amenable number.

25254949849 is a deficient number, since it is larger than the sum of its proper divisors (355703591).

25254949849 is an equidigital number, since it uses as much as digits as its factorization.

25254949849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355703590.

The product of its digits is 37324800, while the sum is 61.

The spelling of 25254949849 in words is "twenty-five billion, two hundred fifty-four million, nine hundred forty-nine thousand, eight hundred forty-nine".