991058168 has 16 divisors (see below), whose sum is σ = 1897771680. Its totient is φ = 484985728.

The previous prime is 991058113. The next prime is 991058179. The reversal of 991058168 is 861850199.

991058168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (47).

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, 1317521 + ... + 1318272.

It is an arithmetic number, because the mean of its divisors is an integer number (118610730).

Almost surely, 2^991058168 is an apocalyptic number.

It is an amenable number.

991058168 is a deficient number, since it is larger than the sum of its proper divisors (906713512).

991058168 is a wasteful number, since it uses less digits than its factorization.

991058168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635846 (or 2635842 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 47.

The square root of 991058168 is about 31481.0763475457. The cubic root of 991058168 is about 997.0104608955.

The spelling of 991058168 in words is "nine hundred ninety-one million, fifty-eight thousand, one hundred sixty-eight".