9890822491 has 16 divisors (see below), whose sum is σ = 11040588000. Its totient is φ = 8784806400.

The previous prime is 9890822477. The next prime is 9890822567. The reversal of 9890822491 is 1942280989.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9890822491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9890822401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50515 + ... + 149443.

It is an arithmetic number, because the mean of its divisors is an integer number (690036750).

Almost surely, 2^9890822491 is an apocalyptic number.

9890822491 is a deficient number, since it is larger than the sum of its proper divisors (1149765509).

9890822491 is a wasteful number, since it uses less digits than its factorization.

9890822491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99150.

The product of its (nonzero) digits is 746496, while the sum is 52.

The square root of 9890822491 is about 99452.6142994743. The cubic root of 9890822491 is about 2146.5654549610.

The spelling of 9890822491 in words is "nine billion, eight hundred ninety million, eight hundred twenty-two thousand, four hundred ninety-one".