91636428850 has 24 divisors (see below), whose sum is σ = 174600926388. Its totient is φ = 35760556800.

The previous prime is 91636428847. The next prime is 91636428929. The reversal of 91636428850 is 5882463619.

It can be written as a sum of positive squares in 6 ways, for example, as 35149875289 + 56486553561 = 187483^2 + 237669^2 .

It is a super-2 number, since 2×91636428850² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22348299 + ... + 22352398.

Almost surely, 2^91636428850 is an apocalyptic number.

91636428850 is a deficient number, since it is larger than the sum of its proper divisors (82964497538).

91636428850 is a wasteful number, since it uses less digits than its factorization.

91636428850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44700750 (or 44700745 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 91636428850 in words is "ninety-one billion, six hundred thirty-six million, four hundred twenty-eight thousand, eight hundred fifty".