64516446 has 64 divisors (see below), whose sum is σ = 147470400. Its totient is φ = 20901888.

The previous prime is 64516421. The next prime is 64516447. The reversal of 64516446 is 64461546.

64516446 = 146² + 147² + ... + 581².

64516446 is a `hidden beast` number, since 6 + 4 + 5 + 1 + 644 + 6 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 64516446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64516447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 570886 + ... + 570998.

It is an arithmetic number, because the mean of its divisors is an integer number (2304225).

Almost surely, 2^64516446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64516446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73735200).

64516446 is an abundant number, since it is smaller than the sum of its proper divisors (82953954).

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

64516446 is a wasteful number, since it uses less digits than its factorization.

64516446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330 (or 324 counting only the distinct ones).

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

The square root of 64516446 is about 8032.2130200836. The cubic root of 64516446 is about 401.0730480125.

The spelling of 64516446 in words is "sixty-four million, five hundred sixteen thousand, four hundred forty-six".