64554521 has 2 divisors, whose sum is σ = 64554522. Its totient is φ = 64554520.

The previous prime is 64554499. The next prime is 64554563. The reversal of 64554521 is 12545546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40896025 + 23658496 = 6395^2 + 4864^2 .

It is a cyclic number.

It is not a de Polignac number, because 64554521 - 2¹⁸ = 64292377 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64554221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32277260 + 32277261.

It is an arithmetic number, because the mean of its divisors is an integer number (32277261).

Almost surely, 2^64554521 is an apocalyptic number.

It is an amenable number.

64554521 is a deficient number, since it is larger than the sum of its proper divisors (1).

64554521 is an equidigital number, since it uses as much as digits as its factorization.

64554521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24000, while the sum is 32.

The square root of 64554521 is about 8034.5828143097. The cubic root of 64554521 is about 401.1519315332.

The spelling of 64554521 in words is "sixty-four million, five hundred fifty-four thousand, five hundred twenty-one".