91435906550 has 12 divisors (see below), whose sum is σ = 170070786276. Its totient is φ = 36574362600.

The previous prime is 91435906547. The next prime is 91435906553. The reversal of 91435906550 is 5560953419.

It is an interprime number because it is at equal distance from previous prime (91435906547) and next prime (91435906553).

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91435906495 and 91435906504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91435906553) 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 in 5 ways as a sum of consecutive naturals, for example, 914359016 + ... + 914359115.

It is an arithmetic number, because the mean of its divisors is an integer number (14172565523).

Almost surely, 2^91435906550 is an apocalyptic number.

91435906550 is a deficient number, since it is larger than the sum of its proper divisors (78634879726).

91435906550 is a wasteful number, since it uses less digits than its factorization.

91435906550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828718143 (or 1828718138 counting only the distinct ones).

The product of its (nonzero) digits is 729000, while the sum is 47.

The spelling of 91435906550 in words is "ninety-one billion, four hundred thirty-five million, nine hundred six thousand, five hundred fifty".