25436662359961 has 2 divisors, whose sum is σ = 25436662359962. Its totient is φ = 25436662359960.

The previous prime is 25436662359931. The next prime is 25436662360003. The reversal of 25436662359961 is 16995326663452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25305618359961 + 131044000000 = 5030469^2 + 362000^2 .

It is a cyclic number.

It is not a de Polignac number, because 25436662359961 - 2⁷ = 25436662359833 is a prime.

It is not a weakly prime, because it can be changed into another prime (25436662359931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12718331179980 + 12718331179981.

It is an arithmetic number, because the mean of its divisors is an integer number (12718331179981).

Almost surely, 2^{25436662359961} is an apocalyptic number.

It is an amenable number.

25436662359961 is a deficient number, since it is larger than the sum of its proper divisors (1).

25436662359961 is an equidigital number, since it uses as much as digits as its factorization.

25436662359961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 377913600, while the sum is 67.

The spelling of 25436662359961 in words is "twenty-five trillion, four hundred thirty-six billion, six hundred sixty-two million, three hundred fifty-nine thousand, nine hundred sixty-one".