64991112 has 32 divisors (see below), whose sum is σ = 162751680. Its totient is φ = 21627200.

The previous prime is 64991111. The next prime is 64991149. The reversal of 64991112 is 21119946.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (64991111) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14893 + ... + 18755.

It is an arithmetic number, because the mean of its divisors is an integer number (5085990).

Almost surely, 2^64991112 is an apocalyptic number.

It is an amenable number.

64991112 is an abundant number, since it is smaller than the sum of its proper divisors (97760568).

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

64991112 is a wasteful number, since it uses less digits than its factorization.

64991112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4573 (or 4569 counting only the distinct ones).

The product of its digits is 3888, while the sum is 33.

The square root of 64991112 is about 8061.7065190938. The cubic root of 64991112 is about 402.0542487617.

The spelling of 64991112 in words is "sixty-four million, nine hundred ninety-one thousand, one hundred twelve".