9091691851 has 16 divisors (see below), whose sum is σ = 10605631968. Its totient is φ = 7701952000.

The previous prime is 9091691803. The next prime is 9091691863. The reversal of 9091691851 is 1581961909.

9091691851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9091691851 - 2⁹ = 9091691339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9091691795 and 9091691804.

It is not an unprimeable number, because it can be changed into a prime (9091691801) 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 15 ways as a sum of consecutive naturals, for example, 221800 + ... + 259573.

It is an arithmetic number, because the mean of its divisors is an integer number (662851998).

Almost surely, 2^9091691851 is an apocalyptic number.

9091691851 is a deficient number, since it is larger than the sum of its proper divisors (1513940117).

9091691851 is a wasteful number, since it uses less digits than its factorization.

9091691851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481502.

The product of its (nonzero) digits is 174960, while the sum is 49.

The square root of 9091691851 is about 95350.3636647496. The cubic root of 9091691851 is about 2087.1239219530.

The spelling of 9091691851 in words is "nine billion, ninety-one million, six hundred ninety-one thousand, eight hundred fifty-one".