991367064 has 48 divisors (see below), whose sum is σ = 2747401800. Its totient is φ = 322769664.

The previous prime is 991367033. The next prime is 991367071. The reversal of 991367064 is 460763199.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157009 + ... + 163200.

Almost surely, 2^991367064 is an apocalyptic number.

It is an amenable number.

991367064 is an abundant number, since it is smaller than the sum of its proper divisors (1756034736).

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

991367064 is a wasteful number, since it uses less digits than its factorization.

991367064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320264 (or 320257 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 991367064 is about 31485.9820237515. The cubic root of 991367064 is about 997.1140338784.

The spelling of 991367064 in words is "nine hundred ninety-one million, three hundred sixty-seven thousand, sixty-four".