991714650 has 48 divisors (see below), whose sum is σ = 2490614400. Its totient is φ = 261106560.

The previous prime is 991714631. The next prime is 991714681. The reversal of 991714650 is 56417199.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29995 + ... + 53694.

It is an arithmetic number, because the mean of its divisors is an integer number (51887800).

Almost surely, 2^991714650 is an apocalyptic number.

991714650 is an abundant number, since it is smaller than the sum of its proper divisors (1498899750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

991714650 is a wasteful number, since it uses less digits than its factorization.

991714650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83783 (or 83778 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 991714650 is about 31491.5012344601. The cubic root of 991714650 is about 997.2305539154.

The spelling of 991714650 in words is "nine hundred ninety-one million, seven hundred fourteen thousand, six hundred fifty".