25495759489 has 4 divisors (see below), whose sum is σ = 25502132656. Its totient is φ = 25489386324.

The previous prime is 25495759459. The next prime is 25495759493. The reversal of 25495759489 is 98495759452.

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 25495759489 - 2¹³ = 25495751297 is a prime.

It is a super-2 number, since 2×25495759489² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25495759459) 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, 3180579 + ... + 3188584.

It is an arithmetic number, because the mean of its divisors is an integer number (6375533164).

Almost surely, 2^25495759489 is an apocalyptic number.

It is an amenable number.

25495759489 is a deficient number, since it is larger than the sum of its proper divisors (6373167).

25495759489 is an equidigital number, since it uses as much as digits as its factorization.

25495759489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6373166.

The product of its digits is 163296000, while the sum is 67.

The spelling of 25495759489 in words is "twenty-five billion, four hundred ninety-five million, seven hundred fifty-nine thousand, four hundred eighty-nine".