91091829092 has 48 divisors (see below), whose sum is σ = 174760709760. Its totient is φ = 41201529600.

The previous prime is 91091829083. The next prime is 91091829097. The reversal of 91091829092 is 29092819019.

It is a super-2 number, since 2×91091829092² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 91091829092.

It is not an unprimeable number, because it can be changed into a prime (91091829097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8437634 + ... + 8448422.

It is an arithmetic number, because the mean of its divisors is an integer number (3640848120).

Almost surely, 2^91091829092 is an apocalyptic number.

It is an amenable number.

91091829092 is a deficient number, since it is larger than the sum of its proper divisors (83668880668).

91091829092 is a wasteful number, since it uses less digits than its factorization.

91091829092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11732 (or 11730 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 50.

The spelling of 91091829092 in words is "ninety-one billion, ninety-one million, eight hundred twenty-nine thousand, ninety-two".