9806977850091 has 4 divisors (see below), whose sum is σ = 13075970466792. Its totient is φ = 6537985233392.

The previous prime is 9806977850083. The next prime is 9806977850113. The reversal of 9806977850091 is 1900587796089.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9806977850091 - 2³ = 9806977850083 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9806977849998 and 9806977850025.

It is not an unprimeable number, because it can be changed into a prime (9806977850081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1634496308346 + ... + 1634496308351.

It is an arithmetic number, because the mean of its divisors is an integer number (3268992616698).

Almost surely, 2^{9806977850091} is an apocalyptic number.

9806977850091 is a deficient number, since it is larger than the sum of its proper divisors (3268992616701).

9806977850091 is a wasteful number, since it uses less digits than its factorization.

9806977850091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3268992616700.

The product of its (nonzero) digits is 68584320, while the sum is 69.

The spelling of 9806977850091 in words is "nine trillion, eight hundred six billion, nine hundred seventy-seven million, eight hundred fifty thousand, ninety-one".