91759212550 has 12 divisors (see below), whose sum is σ = 170672135436. Its totient is φ = 36703685000.

The previous prime is 91759212539. The next prime is 91759212551. The reversal of 91759212550 is 5521295719.

It is a self number, because there is not a number n which added to its sum of digits gives 91759212550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91759212551) 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, 917592076 + ... + 917592175.

It is an arithmetic number, because the mean of its divisors is an integer number (14222677953).

Almost surely, 2^91759212550 is an apocalyptic number.

91759212550 is a deficient number, since it is larger than the sum of its proper divisors (78912922886).

91759212550 is a wasteful number, since it uses less digits than its factorization.

91759212550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835184263 (or 1835184258 counting only the distinct ones).

The product of its (nonzero) digits is 283500, while the sum is 46.

The spelling of 91759212550 in words is "ninety-one billion, seven hundred fifty-nine million, two hundred twelve thousand, five hundred fifty".