91029726850 has 12 divisors (see below), whose sum is σ = 169315292034. Its totient is φ = 36411890720.

The previous prime is 91029726847. The next prime is 91029726917. The reversal of 91029726850 is 5862792019.

It can be written as a sum of positive squares in 3 ways, for example, as 88703304561 + 2326422289 = 297831^2 + 48233^2 .

It is a super-2 number, since 2×91029726850² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91029726794 and 91029726803.

It is an unprimeable number.

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, 910297219 + ... + 910297318.

Almost surely, 2^91029726850 is an apocalyptic number.

91029726850 is a deficient number, since it is larger than the sum of its proper divisors (78285565184).

91029726850 is a wasteful number, since it uses less digits than its factorization.

91029726850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820594549 (or 1820594544 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 91029726850 in words is "ninety-one billion, twenty-nine million, seven hundred twenty-six thousand, eight hundred fifty".