64477646 has 16 divisors (see below), whose sum is σ = 98520576. Its totient is φ = 31643136.

The previous prime is 64477639. The next prime is 64477649. The reversal of 64477646 is 64677446.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64477597 and 64477606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64477649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23330 + ... + 25946.

It is an arithmetic number, because the mean of its divisors is an integer number (6157536).

Almost surely, 2^64477646 is an apocalyptic number.

64477646 is a deficient number, since it is larger than the sum of its proper divisors (34042930).

64477646 is a wasteful number, since it uses less digits than its factorization.

64477646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2843.

The product of its digits is 677376, while the sum is 44.

The square root of 64477646 is about 8029.7973822507. The cubic root of 64477646 is about 400.9926305074.

The spelling of 64477646 in words is "sixty-four million, four hundred seventy-seven thousand, six hundred forty-six".