25420373489 has 4 divisors (see below), whose sum is σ = 29051855424. Its totient is φ = 21788891556.

The previous prime is 25420373483. The next prime is 25420373497. The reversal of 25420373489 is 98437302452.

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 25420373489 - 2¹² = 25420369393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25420373483) 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, 1815740957 + ... + 1815740970.

It is an arithmetic number, because the mean of its divisors is an integer number (7262963856).

Almost surely, 2^25420373489 is an apocalyptic number.

It is an amenable number.

25420373489 is a deficient number, since it is larger than the sum of its proper divisors (3631481935).

25420373489 is an equidigital number, since it uses as much as digits as its factorization.

25420373489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3631481934.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 25420373489 in words is "twenty-five billion, four hundred twenty million, three hundred seventy-three thousand, four hundred eighty-nine".