25506733996813 has 16 divisors (see below), whose sum is σ = 26714878603776. Its totient is φ = 24333101135280.

The previous prime is 25506733996781. The next prime is 25506733996819. The reversal of 25506733996813 is 31869933760552.

It is a cyclic number.

It is not a de Polignac number, because 25506733996813 - 2⁵ = 25506733996781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25506733996819) 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, 38713731 + ... + 39367072.

It is an arithmetic number, because the mean of its divisors is an integer number (1669679912736).

Almost surely, 2^{25506733996813} is an apocalyptic number.

It is an amenable number.

25506733996813 is a deficient number, since it is larger than the sum of its proper divisors (1208144606963).

25506733996813 is a wasteful number, since it uses less digits than its factorization.

25506733996813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78081024.

The product of its (nonzero) digits is 220449600, while the sum is 67.

The spelling of 25506733996813 in words is "twenty-five trillion, five hundred six billion, seven hundred thirty-three million, nine hundred ninety-six thousand, eight hundred thirteen".