25697549021536 has 96 divisors (see below), whose sum is σ = 57860768351232. Its totient is φ = 11005375073280.

The previous prime is 25697549021527. The next prime is 25697549021597. The reversal of 25697549021536 is 63512094579652.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2785033755 + ... + 2785042981.

It is an arithmetic number, because the mean of its divisors is an integer number (602716336992).

Almost surely, 2^{25697549021536} is an apocalyptic number.

It is an amenable number.

25697549021536 is an abundant number, since it is smaller than the sum of its proper divisors (32163219329696).

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

25697549021536 is a wasteful number, since it uses less digits than its factorization.

25697549021536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16772 (or 16764 counting only the distinct ones).

The product of its (nonzero) digits is 122472000, while the sum is 64.

The spelling of 25697549021536 in words is "twenty-five trillion, six hundred ninety-seven billion, five hundred forty-nine million, twenty-one thousand, five hundred thirty-six".