25097297099808 has 48 divisors (see below), whose sum is σ = 65880809519616. Its totient is φ = 8365714318080.

The previous prime is 25097297099807. The next prime is 25097297099951. The reversal of 25097297099808 is 80899079279052.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 25097297099808.

It is not an unprimeable number, because it can be changed into a prime (25097297099807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16940710 + ... + 18362522.

It is an arithmetic number, because the mean of its divisors is an integer number (1372516864992).

Almost surely, 2^{25097297099808} is an apocalyptic number.

It is an amenable number.

25097297099808 is an abundant number, since it is smaller than the sum of its proper divisors (40783512419808).

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

25097297099808 is a wasteful number, since it uses less digits than its factorization.

25097297099808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605697 (or 1605689 counting only the distinct ones).

The product of its (nonzero) digits is 411505920, while the sum is 75.

The spelling of 25097297099808 in words is "twenty-five trillion, ninety-seven billion, two hundred ninety-seven million, ninety-nine thousand, eight hundred eight".