64616544 has 36 divisors (see below), whose sum is σ = 183754116. Its totient is φ = 21538752.

The previous prime is 64616543. The next prime is 64616569. The reversal of 64616544 is 44561646.

64616544 is a `hidden beast` number, since 646 + 1 + 6 + 5 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 64616499 and 64616508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64616543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111894 + ... + 112469.

It is an arithmetic number, because the mean of its divisors is an integer number (5104281).

Almost surely, 2^64616544 is an apocalyptic number.

It is an amenable number.

64616544 is an abundant number, since it is smaller than the sum of its proper divisors (119137572).

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

64616544 is a wasteful number, since it uses less digits than its factorization.

64616544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224379 (or 224368 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 64616544 is about 8038.4416400195. The cubic root of 64616544 is about 401.2803639642.

The spelling of 64616544 in words is "sixty-four million, six hundred sixteen thousand, five hundred forty-four".