25120504261 has 4 divisors (see below), whose sum is σ = 25122362400. Its totient is φ = 25118646124.

The previous prime is 25120504243. The next prime is 25120504267. The reversal of 25120504261 is 16240502152.

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 a de Polignac number, because none of the positive numbers 2^k-25120504261 is a prime.

It is a super-2 number, since 2×25120504261² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25120504267) 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, 908641 + ... + 935878.

It is an arithmetic number, because the mean of its divisors is an integer number (6280590600).

Almost surely, 2^25120504261 is an apocalyptic number.

It is an amenable number.

25120504261 is a deficient number, since it is larger than the sum of its proper divisors (1858139).

25120504261 is a wasteful number, since it uses less digits than its factorization.

25120504261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858138.

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 25120504261 in words is "twenty-five billion, one hundred twenty million, five hundred four thousand, two hundred sixty-one".