64657553 has 2 divisors, whose sum is σ = 64657554. Its totient is φ = 64657552.

The previous prime is 64657547. The next prime is 64657573. The reversal of 64657553 is 35575646.

64657553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63234304 + 1423249 = 7952^2 + 1193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64657553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64657553.

It is not a weakly prime, because it can be changed into another prime (64657543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32328776 + 32328777.

It is an arithmetic number, because the mean of its divisors is an integer number (32328777).

Almost surely, 2^64657553 is an apocalyptic number.

It is an amenable number.

64657553 is a deficient number, since it is larger than the sum of its proper divisors (1).

64657553 is an equidigital number, since it uses as much as digits as its factorization.

64657553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378000, while the sum is 41.

The square root of 64657553 is about 8040.9920407870. The cubic root of 64657553 is about 401.3652371012.

The spelling of 64657553 in words is "sixty-four million, six hundred fifty-seven thousand, five hundred fifty-three".