91010010050 has 12 divisors (see below), whose sum is σ = 169278618786. Its totient is φ = 36404004000.

The previous prime is 91010009971. The next prime is 91010010079. The reversal of 91010010050 is 5001001019.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 75938273761 + 15071736289 = 275569^2 + 122767^2 .

It is a super-2 number, since 2×91010010050² (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 (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 910100051 + ... + 910100150.

Almost surely, 2^91010010050 is an apocalyptic number.

91010010050 is a deficient number, since it is larger than the sum of its proper divisors (78268608736).

91010010050 is a wasteful number, since it uses less digits than its factorization.

91010010050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820200213 (or 1820200208 counting only the distinct ones).

The product of its (nonzero) digits is 45, while the sum is 17.

Adding to 91010010050 its reverse (5001001019), we get a palindrome (96011011069).

The spelling of 91010010050 in words is "ninety-one billion, ten million, ten thousand, fifty".