91464550999 has 2 divisors, whose sum is σ = 91464551000. Its totient is φ = 91464550998.

The previous prime is 91464550943. The next prime is 91464551027. The reversal of 91464550999 is 99905546419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91464550999 - 2⁹ = 91464550487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91464550939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45732275499 + 45732275500.

It is an arithmetic number, because the mean of its divisors is an integer number (45732275500).

Almost surely, 2^91464550999 is an apocalyptic number.

91464550999 is a deficient number, since it is larger than the sum of its proper divisors (1).

91464550999 is an equidigital number, since it uses as much as digits as its factorization.

91464550999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15746400, while the sum is 61.

The spelling of 91464550999 in words is "ninety-one billion, four hundred sixty-four million, five hundred fifty thousand, nine hundred ninety-nine".