291552710689 has 2 divisors, whose sum is σ = 291552710690. Its totient is φ = 291552710688.

The previous prime is 291552710651. The next prime is 291552710719. The reversal of 291552710689 is 986017255192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 285271355664 + 6281355025 = 534108^2 + 79255^2 .

It is a cyclic number.

It is not a de Polignac number, because 291552710689 - 2¹⁵ = 291552677921 is a prime.

It is a super-2 number, since 2×291552710689² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (291552710629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145776355344 + 145776355345.

It is an arithmetic number, because the mean of its divisors is an integer number (145776355345).

Almost surely, 2^291552710689 is an apocalyptic number.

It is an amenable number.

291552710689 is a deficient number, since it is larger than the sum of its proper divisors (1).

291552710689 is an equidigital number, since it uses as much as digits as its factorization.

291552710689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2721600, while the sum is 55.

The spelling of 291552710689 in words is "two hundred ninety-one billion, five hundred fifty-two million, seven hundred ten thousand, six hundred eighty-nine".