64646036 has 96 divisors (see below), whose sum is σ = 152635392. Its totient is φ = 23224320.

The previous prime is 64646033. The next prime is 64646069. The reversal of 64646036 is 63064646.

It is a junction number, because it is equal to n+sod(n) for n = 64645987 and 64646005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64646033) 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, 191660 + ... + 191996.

It is an arithmetic number, because the mean of its divisors is an integer number (1589952).

Almost surely, 2^64646036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64646036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76317696).

64646036 is an abundant number, since it is smaller than the sum of its proper divisors (87989356).

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

64646036 is a wasteful number, since it uses less digits than its factorization.

64646036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 35.

The square root of 64646036 is about 8040.2758659141. The cubic root of 64646036 is about 401.3414048872.

The spelling of 64646036 in words is "sixty-four million, six hundred forty-six thousand, thirty-six".