64445536 has 12 divisors (see below), whose sum is σ = 126877212. Its totient is φ = 32222752.

The previous prime is 64445531. The next prime is 64445551. The reversal of 64445536 is 63554446.

It is a super-2 number, since 2×64445536² = 8306454220654592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64445495 and 64445504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64445531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006930 + ... + 1006993.

It is an arithmetic number, because the mean of its divisors is an integer number (10573101).

Almost surely, 2^64445536 is an apocalyptic number.

It is an amenable number.

64445536 is a deficient number, since it is larger than the sum of its proper divisors (62431676).

64445536 is a wasteful number, since it uses less digits than its factorization.

64445536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2013933 (or 2013925 counting only the distinct ones).

The product of its digits is 172800, while the sum is 37.

The square root of 64445536 is about 8027.7977054732. The cubic root of 64445536 is about 400.9260544036.

The spelling of 64445536 in words is "sixty-four million, four hundred forty-five thousand, five hundred thirty-six".