25099956509801 has 2 divisors, whose sum is σ = 25099956509802. Its totient is φ = 25099956509800.

The previous prime is 25099956509777. The next prime is 25099956509821. The reversal of 25099956509801 is 10890565999052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24383053926400 + 716902583401 = 4937920^2 + 846701^2 .

It is a cyclic number.

It is not a de Polignac number, because 25099956509801 - 2¹⁰ = 25099956508777 is a prime.

It is not a weakly prime, because it can be changed into another prime (25099956509821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12549978254900 + 12549978254901.

It is an arithmetic number, because the mean of its divisors is an integer number (12549978254901).

Almost surely, 2^{25099956509801} is an apocalyptic number.

It is an amenable number.

25099956509801 is a deficient number, since it is larger than the sum of its proper divisors (1).

25099956509801 is an equidigital number, since it uses as much as digits as its factorization.

25099956509801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732000, while the sum is 68.

The spelling of 25099956509801 in words is "twenty-five trillion, ninety-nine billion, nine hundred fifty-six million, five hundred nine thousand, eight hundred one".