64521055 has 8 divisors (see below), whose sum is σ = 81500400. Its totient is φ = 48900096.

The previous prime is 64521053. The next prime is 64521071. The reversal of 64521055 is 55012546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64521055 - 2¹ = 64521053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64521053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339490 + ... + 339679.

It is an arithmetic number, because the mean of its divisors is an integer number (10187550).

Almost surely, 2^64521055 is an apocalyptic number.

64521055 is a deficient number, since it is larger than the sum of its proper divisors (16979345).

64521055 is a wasteful number, since it uses less digits than its factorization.

64521055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679193.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 64521055 is about 8032.4999221911. The cubic root of 64521055 is about 401.0825985575.

The spelling of 64521055 in words is "sixty-four million, five hundred twenty-one thousand, fifty-five".