25457996880 has 60 divisors (see below), whose sum is σ = 85496441940. Its totient is φ = 6788798976.

The previous prime is 25457996857. The next prime is 25457996881. The reversal of 25457996880 is 8869975452.

25457996880 is a `hidden beast` number, since 2 + 54 + 579 + 9 + 6 + 8 + 8 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6437173824 + 19020823056 = 80232^2 + 137916^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25457996881) 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 11 ways as a sum of consecutive naturals, for example, 17678445 + ... + 17679884.

It is an arithmetic number, because the mean of its divisors is an integer number (1424940699).

Almost surely, 2^25457996880 is an apocalyptic number.

25457996880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25457996880 is an abundant number, since it is smaller than the sum of its proper divisors (60038445060).

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

25457996880 is a wasteful number, since it uses less digits than its factorization.

25457996880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35358348 (or 35358339 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 63.

The spelling of 25457996880 in words is "twenty-five billion, four hundred fifty-seven million, nine hundred ninety-six thousand, eight hundred eighty".