869475250591 has 2 divisors, whose sum is σ = 869475250592. Its totient is φ = 869475250590.

The previous prime is 869475250577. The next prime is 869475250601. The reversal of 869475250591 is 195052574968.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 869475250591 - 2⁵ = 869475250559 is a prime.

It is a super-2 number, since 2×869475250591² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869475250531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434737625295 + 434737625296.

It is an arithmetic number, because the mean of its divisors is an integer number (434737625296).

Almost surely, 2^869475250591 is an apocalyptic number.

869475250591 is a deficient number, since it is larger than the sum of its proper divisors (1).

869475250591 is an equidigital number, since it uses as much as digits as its factorization.

869475250591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216000, while the sum is 61.

The spelling of 869475250591 in words is "eight hundred sixty-nine billion, four hundred seventy-five million, two hundred fifty thousand, five hundred ninety-one".