25425992049 has 4 divisors (see below), whose sum is σ = 33901322736. Its totient is φ = 16950661364.

The previous prime is 25425992029. The next prime is 25425992069. The reversal of 25425992049 is 94029952452.

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 an interprime number because it is at equal distance from previous prime (25425992029) and next prime (25425992069).

It is a cyclic number.

It is not a de Polignac number, because 25425992049 - 2¹⁹ = 25425467761 is a prime.

It is a super-2 number, since 2×25425992049² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25425991992 and 25425992010.

It is not an unprimeable number, because it can be changed into a prime (25425992029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4237665339 + ... + 4237665344.

It is an arithmetic number, because the mean of its divisors is an integer number (8475330684).

Almost surely, 2^25425992049 is an apocalyptic number.

It is an amenable number.

25425992049 is a deficient number, since it is larger than the sum of its proper divisors (8475330687).

25425992049 is an equidigital number, since it uses as much as digits as its factorization.

25425992049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8475330686.

The product of its (nonzero) digits is 2332800, while the sum is 51.

The spelling of 25425992049 in words is "twenty-five billion, four hundred twenty-five million, nine hundred ninety-two thousand, forty-nine".