25251252638765 has 16 divisors (see below), whose sum is σ = 30339323932800. Its totient is φ = 20175803980992.

The previous prime is 25251252638713. The next prime is 25251252638767. The reversal of 25251252638765 is 56783625215252.

It is a cyclic number.

It is not a de Polignac number, because 25251252638765 - 2⁸ = 25251252638509 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25251252638767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11895806 + ... + 13856864.

It is an arithmetic number, because the mean of its divisors is an integer number (1896207745800).

Almost surely, 2^{25251252638765} is an apocalyptic number.

It is an amenable number.

25251252638765 is a deficient number, since it is larger than the sum of its proper divisors (5088071294035).

25251252638765 is a wasteful number, since it uses less digits than its factorization.

25251252638765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964276.

The product of its digits is 60480000, while the sum is 59.

The spelling of 25251252638765 in words is "twenty-five trillion, two hundred fifty-one billion, two hundred fifty-two million, six hundred thirty-eight thousand, seven hundred sixty-five".