25045063681 has 16 divisors (see below), whose sum is σ = 28069992000. Its totient is φ = 22145244480.

The previous prime is 25045063661. The next prime is 25045063721. The reversal of 25045063681 is 18636054052.

It is a cyclic number.

It is not a de Polignac number, because 25045063681 - 2²³ = 25036675073 is a prime.

It is a super-2 number, since 2×25045063681² (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 (25045063621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1402195 + ... + 1419943.

It is an arithmetic number, because the mean of its divisors is an integer number (1754374500).

Almost surely, 2^25045063681 is an apocalyptic number.

It is an amenable number.

25045063681 is a deficient number, since it is larger than the sum of its proper divisors (3024928319).

25045063681 is a wasteful number, since it uses less digits than its factorization.

25045063681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21264.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 25045063681 in words is "twenty-five billion, forty-five million, sixty-three thousand, six hundred eighty-one".