25046867815961 has 2 divisors, whose sum is σ = 25046867815962. Its totient is φ = 25046867815960.

The previous prime is 25046867815919. The next prime is 25046867816039. The reversal of 25046867815961 is 16951876864052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13128078246361 + 11918789569600 = 3623269^2 + 3452360^2 .

It is a cyclic number.

It is not a de Polignac number, because 25046867815961 - 2¹⁰ = 25046867814937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25046867815891 and 25046867815900.

It is not a weakly prime, because it can be changed into another prime (25046867815901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12523433907980 + 12523433907981.

It is an arithmetic number, because the mean of its divisors is an integer number (12523433907981).

Almost surely, 2^{25046867815961} is an apocalyptic number.

It is an amenable number.

25046867815961 is a deficient number, since it is larger than the sum of its proper divisors (1).

25046867815961 is an equidigital number, since it uses as much as digits as its factorization.

25046867815961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174182400, while the sum is 68.

The spelling of 25046867815961 in words is "twenty-five trillion, forty-six billion, eight hundred sixty-seven million, eight hundred fifteen thousand, nine hundred sixty-one".