25325251056399 has 128 divisors (see below), whose sum is σ = 40267817441280. Its totient is φ = 13859373072384.

The previous prime is 25325251056377. The next prime is 25325251056449. The reversal of 25325251056399 is 99365015252352.

It is a happy number.

It is a Cunningham number, because it is equal to 5032420²-1.

It is not a de Polignac number, because 25325251056399 - 2⁹ = 25325251055887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25325251056199) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4544273377 + ... + 4544278949.

It is an arithmetic number, because the mean of its divisors is an integer number (314592323760).

Almost surely, 2^{25325251056399} is an apocalyptic number.

25325251056399 is a deficient number, since it is larger than the sum of its proper divisors (14942566384881).

25325251056399 is a wasteful number, since it uses less digits than its factorization.

25325251056399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6209.

The product of its (nonzero) digits is 21870000, while the sum is 57.

The spelling of 25325251056399 in words is "twenty-five trillion, three hundred twenty-five billion, two hundred fifty-one million, fifty-six thousand, three hundred ninety-nine".