25389262081 has 4 divisors (see below), whose sum is σ = 25478977072. Its totient is φ = 25299547092.

The previous prime is 25389262079. The next prime is 25389262117. The reversal of 25389262081 is 18026298352.

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 25389262081 - 2¹ = 25389262079 is a prime.

It is a super-2 number, since 2×25389262081² (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 (25389262001) 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, 44857071 + ... + 44857636.

It is an arithmetic number, because the mean of its divisors is an integer number (6369744268).

Almost surely, 2^25389262081 is an apocalyptic number.

It is an amenable number.

25389262081 is a deficient number, since it is larger than the sum of its proper divisors (89714991).

25389262081 is an equidigital number, since it uses as much as digits as its factorization.

25389262081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89714990.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 25389262081 in words is "twenty-five billion, three hundred eighty-nine million, two hundred sixty-two thousand, eighty-one".