25472728761 has 4 divisors (see below), whose sum is σ = 33963638352. Its totient is φ = 16981819172.

The previous prime is 25472728759. The next prime is 25472728777. The reversal of 25472728761 is 16782727452.

It is a happy number.

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 25472728761 - 2¹ = 25472728759 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25472728751) 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, 4245454791 + ... + 4245454796.

It is an arithmetic number, because the mean of its divisors is an integer number (8490909588).

Almost surely, 2^25472728761 is an apocalyptic number.

It is an amenable number.

25472728761 is a deficient number, since it is larger than the sum of its proper divisors (8490909591).

25472728761 is an equidigital number, since it uses as much as digits as its factorization.

25472728761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8490909590.

The product of its digits is 2634240, while the sum is 51.

The spelling of 25472728761 in words is "twenty-five billion, four hundred seventy-two million, seven hundred twenty-eight thousand, seven hundred sixty-one".