64111444 has 6 divisors (see below), whose sum is σ = 112195034. Its totient is φ = 32055720.

The previous prime is 64111391. The next prime is 64111457. The reversal of 64111444 is 44411146.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 56821444 + 7290000 = 7538^2 + 2700^2 .

It is a super-2 number, since 2×64111444² = 8220554503530272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8013927 + ... + 8013934.

Almost surely, 2^64111444 is an apocalyptic number.

It is an amenable number.

64111444 is a deficient number, since it is larger than the sum of its proper divisors (48083590).

64111444 is a wasteful number, since it uses less digits than its factorization.

64111444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16027865 (or 16027863 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 64111444 is about 8006.9622204679. The cubic root of 64111444 is about 400.2320403671.

The spelling of 64111444 in words is "sixty-four million, one hundred eleven thousand, four hundred forty-four".