25751081680 has 40 divisors (see below), whose sum is σ = 60852772584. Its totient is φ = 10131571200.

The previous prime is 25751081669. The next prime is 25751081689. The reversal of 25751081680 is 8618015752.

It can be written as a sum of positive squares in 4 ways, for example, as 2760031296 + 22991050384 = 52536^2 + 151628^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×25751081680³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25751081689) 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 7 ways as a sum of consecutive naturals, for example, 2633551 + ... + 2643310.

Almost surely, 2^25751081680 is an apocalyptic number.

25751081680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25751081680 is an abundant number, since it is smaller than the sum of its proper divisors (35101690904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25751081680 is a wasteful number, since it uses less digits than its factorization.

25751081680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5276935 (or 5276929 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 43.

The spelling of 25751081680 in words is "twenty-five billion, seven hundred fifty-one million, eighty-one thousand, six hundred eighty".