64773630 has 48 divisors (see below), whose sum is σ = 170735760. Its totient is φ = 17034624.

The previous prime is 64773571. The next prime is 64773637. The reversal of 64773630 is 3637746.

64773630 is a `hidden beast` number, since 647 + 7 + 3 + 6 + 3 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64773637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1641 + ... + 11499.

It is an arithmetic number, because the mean of its divisors is an integer number (3556995).

Almost surely, 2^64773630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64773630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85367880).

64773630 is an abundant number, since it is smaller than the sum of its proper divisors (105962130).

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

64773630 is a wasteful number, since it uses less digits than its factorization.

64773630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9945 (or 9942 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 36.

The square root of 64773630 is about 8048.2066325362. The cubic root of 64773630 is about 401.6052782529.

The spelling of 64773630 in words is "sixty-four million, seven hundred seventy-three thousand, six hundred thirty".