64445672 has 32 divisors (see below), whose sum is σ = 123638400. Its totient is φ = 31484544.

The previous prime is 64445669. The next prime is 64445687. The reversal of 64445672 is 27654446.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67148 + ... + 68100.

It is an arithmetic number, because the mean of its divisors is an integer number (3863700).

Almost surely, 2^64445672 is an apocalyptic number.

It is an amenable number.

64445672 is a deficient number, since it is larger than the sum of its proper divisors (59192728).

64445672 is a wasteful number, since it uses less digits than its factorization.

64445672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145 (or 1141 counting only the distinct ones).

The product of its digits is 161280, while the sum is 38.

The square root of 64445672 is about 8027.8061760359. The cubic root of 64445672 is about 400.9263364294.

The spelling of 64445672 in words is "sixty-four million, four hundred forty-five thousand, six hundred seventy-two".