64764594 has 48 divisors (see below), whose sum is σ = 149972472. Its totient is φ = 20127744.

The previous prime is 64764593. The next prime is 64764607. The reversal of 64764594 is 49546746.

It can be written as a sum of positive squares in 4 ways, for example, as 26163225 + 38601369 = 5115^2 + 6213^2 .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64764593) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33642 + ... + 35514.

Almost surely, 2^64764594 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64764594, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74986236).

64764594 is an abundant number, since it is smaller than the sum of its proper divisors (85207878).

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

64764594 is a wasteful number, since it uses less digits than its factorization.

64764594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011 (or 2008 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 64764594 is about 8047.6452456604. The cubic root of 64764594 is about 401.5866025766.

The spelling of 64764594 in words is "sixty-four million, seven hundred sixty-four thousand, five hundred ninety-four".