25621516415153 has 2 divisors, whose sum is σ = 25621516415154. Its totient is φ = 25621516415152.

The previous prime is 25621516415149. The next prime is 25621516415329. The reversal of 25621516415153 is 35151461512652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17142191737969 + 8479324677184 = 4140313^2 + 2911928^2 .

It is a cyclic number.

It is not a de Polignac number, because 25621516415153 - 2² = 25621516415149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25621516415098 and 25621516415107.

It is not a weakly prime, because it can be changed into another prime (25621516405153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12810758207576 + 12810758207577.

It is an arithmetic number, because the mean of its divisors is an integer number (12810758207577).

Almost surely, 2^{25621516415153} is an apocalyptic number.

It is an amenable number.

25621516415153 is a deficient number, since it is larger than the sum of its proper divisors (1).

25621516415153 is an equidigital number, since it uses as much as digits as its factorization.

25621516415153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080000, while the sum is 47.

The spelling of 25621516415153 in words is "twenty-five trillion, six hundred twenty-one billion, five hundred sixteen million, four hundred fifteen thousand, one hundred fifty-three".