64334556 has 72 divisors (see below), whose sum is σ = 191069424. Its totient is φ = 17994240.

The previous prime is 64334549. The next prime is 64334593. The reversal of 64334556 is 65543346.

64334556 is a `hidden beast` number, since 643 + 3 + 4 + 5 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 64334556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1101 + ... + 11396.

It is an arithmetic number, because the mean of its divisors is an integer number (2653742).

Almost surely, 2^64334556 is an apocalyptic number.

64334556 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64334556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95534712).

64334556 is an abundant number, since it is smaller than the sum of its proper divisors (126734868).

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

64334556 is a wasteful number, since it uses less digits than its factorization.

64334556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12531 (or 12526 counting only the distinct ones).

The product of its digits is 129600, while the sum is 36.

The square root of 64334556 is about 8020.8824950874. The cubic root of 64334556 is about 400.6957806880.

The spelling of 64334556 in words is "sixty-four million, three hundred thirty-four thousand, five hundred fifty-six".