64111992 has 48 divisors (see below), whose sum is σ = 186451560. Its totient is φ = 18317376.

The previous prime is 64111969. The next prime is 64112003. The reversal of 64111992 is 29911146.

64111992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64111992² = 8220695036416128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26083 + ... + 28434.

Almost surely, 2^64111992 is an apocalyptic number.

It is an amenable number.

64111992 is an abundant number, since it is smaller than the sum of its proper divisors (122339568).

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

64111992 is a wasteful number, since it uses less digits than its factorization.

64111992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54540 (or 54529 counting only the distinct ones).

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

The square root of 64111992 is about 8006.9964406137. The cubic root of 64111992 is about 400.2331807071.

The spelling of 64111992 in words is "sixty-four million, one hundred eleven thousand, nine hundred ninety-two".