9491288990506 has 64 divisors (see below), whose sum is σ = 14841431953920. Its totient is φ = 4549065131520.

The previous prime is 9491288990467. The next prime is 9491288990531. The reversal of 9491288990506 is 6050998821949.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 970375336 + ... + 970385116.

It is an arithmetic number, because the mean of its divisors is an integer number (231897374280).

Almost surely, 2^{9491288990506} is an apocalyptic number.

9491288990506 is a deficient number, since it is larger than the sum of its proper divisors (5350142963414).

9491288990506 is a wasteful number, since it uses less digits than its factorization.

9491288990506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10751.

The product of its (nonzero) digits is 100776960, while the sum is 70.

The spelling of 9491288990506 in words is "nine trillion, four hundred ninety-one billion, two hundred eighty-eight million, nine hundred ninety thousand, five hundred six".