25210265995591 has 2 divisors, whose sum is σ = 25210265995592. Its totient is φ = 25210265995590.

The previous prime is 25210265995567. The next prime is 25210265995711. The reversal of 25210265995591 is 19559956201252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25210265995591 - 2⁷ = 25210265995463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25210265395591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12605132997795 + 12605132997796.

It is an arithmetic number, because the mean of its divisors is an integer number (12605132997796).

Almost surely, 2^{25210265995591} is an apocalyptic number.

25210265995591 is a deficient number, since it is larger than the sum of its proper divisors (1).

25210265995591 is an equidigital number, since it uses as much as digits as its factorization.

25210265995591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21870000, while the sum is 61.

The spelling of 25210265995591 in words is "twenty-five trillion, two hundred ten billion, two hundred sixty-five million, nine hundred ninety-five thousand, five hundred ninety-one".