9081991647506 has 16 divisors (see below), whose sum is σ = 13712526253440. Its totient is φ = 4511181166560.

The previous prime is 9081991647431. The next prime is 9081991647517. The reversal of 9081991647506 is 6057461991809.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7325126 + ... + 8474753.

It is an arithmetic number, because the mean of its divisors is an integer number (857032890840).

Almost surely, 2^{9081991647506} is an apocalyptic number.

9081991647506 is a deficient number, since it is larger than the sum of its proper divisors (4630534605934).

9081991647506 is a wasteful number, since it uses less digits than its factorization.

9081991647506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15801769.

The product of its (nonzero) digits is 29393280, while the sum is 65.

The spelling of 9081991647506 in words is "nine trillion, eighty-one billion, nine hundred ninety-one million, six hundred forty-seven thousand, five hundred six".