91550420359 has 2 divisors, whose sum is σ = 91550420360. Its totient is φ = 91550420358.

The previous prime is 91550420341. The next prime is 91550420393. The reversal of 91550420359 is 95302405519.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91550420359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91550421359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45775210179 + 45775210180.

It is an arithmetic number, because the mean of its divisors is an integer number (45775210180).

Almost surely, 2^91550420359 is an apocalyptic number.

91550420359 is a deficient number, since it is larger than the sum of its proper divisors (1).

91550420359 is an equidigital number, since it uses as much as digits as its factorization.

91550420359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243000, while the sum is 43.

The spelling of 91550420359 in words is "ninety-one billion, five hundred fifty million, four hundred twenty thousand, three hundred fifty-nine".