991285314806 has 8 divisors (see below), whose sum is σ = 1487299437624. Its totient is φ = 495518835600.

The previous prime is 991285314797. The next prime is 991285314829. The reversal of 991285314806 is 608413582199.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61900895 + ... + 61916906.

It is an arithmetic number, because the mean of its divisors is an integer number (185912429703).

Almost surely, 2^991285314806 is an apocalyptic number.

991285314806 is a deficient number, since it is larger than the sum of its proper divisors (496014122818).

991285314806 is a wasteful number, since it uses less digits than its factorization.

991285314806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123821806.

The product of its (nonzero) digits is 3732480, while the sum is 56.

The spelling of 991285314806 in words is "nine hundred ninety-one billion, two hundred eighty-five million, three hundred fourteen thousand, eight hundred six".