25207761121 has 4 divisors (see below), whose sum is σ = 25744096512. Its totient is φ = 24671425732.

The previous prime is 25207761113. The next prime is 25207761179. The reversal of 25207761121 is 12116770252.

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 25207761121 - 2³ = 25207761113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25207761221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268167625 + ... + 268167718.

It is an arithmetic number, because the mean of its divisors is an integer number (6436024128).

Almost surely, 2^25207761121 is an apocalyptic number.

It is an amenable number.

25207761121 is a deficient number, since it is larger than the sum of its proper divisors (536335391).

25207761121 is an equidigital number, since it uses as much as digits as its factorization.

25207761121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536335390.

The product of its (nonzero) digits is 11760, while the sum is 34.

The spelling of 25207761121 in words is "twenty-five billion, two hundred seven million, seven hundred sixty-one thousand, one hundred twenty-one".