64454656 has 64 divisors (see below), whose sum is σ = 147846960. Its totient is φ = 27525120.

The previous prime is 64454653. The next prime is 64454683. The reversal of 64454656 is 65645446.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64454653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229236 + ... + 229516.

Almost surely, 2^64454656 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 64454656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73923480).

64454656 is an abundant number, since it is smaller than the sum of its proper divisors (83392304).

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

64454656 is an frugal number, since it uses more digits than its factorization.

64454656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 290 counting only the distinct ones).

The product of its digits is 345600, while the sum is 40.

The square root of 64454656 is about 8028.3657116502. The cubic root of 64454656 is about 400.9449658409.

The spelling of 64454656 in words is "sixty-four million, four hundred fifty-four thousand, six hundred fifty-six".