25113641761 has 16 divisors (see below), whose sum is σ = 28588089600. Its totient is φ = 21869785728.

The previous prime is 25113641743. The next prime is 25113641767. The reversal of 25113641761 is 16714631152.

It is a cyclic number.

It is not a de Polignac number, because 25113641761 - 2⁷ = 25113641633 is a prime.

It is a super-2 number, since 2×25113641761² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25113641761.

It is not an unprimeable number, because it can be changed into a prime (25113641767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153676 + ... + 271741.

It is an arithmetic number, because the mean of its divisors is an integer number (1786755600).

Almost surely, 2^25113641761 is an apocalyptic number.

It is an amenable number.

25113641761 is a deficient number, since it is larger than the sum of its proper divisors (3474447839).

25113641761 is a wasteful number, since it uses less digits than its factorization.

25113641761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425688.

The product of its digits is 30240, while the sum is 37.

The spelling of 25113641761 in words is "twenty-five billion, one hundred thirteen million, six hundred forty-one thousand, seven hundred sixty-one".