64555199 has 2 divisors, whose sum is σ = 64555200. Its totient is φ = 64555198.

The previous prime is 64555187. The next prime is 64555201. The reversal of 64555199 is 99155546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64555199 - 2¹² = 64551103 is a prime.

Together with 64555201, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64555109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32277599 + 32277600.

It is an arithmetic number, because the mean of its divisors is an integer number (32277600).

Almost surely, 2^64555199 is an apocalyptic number.

64555199 is a deficient number, since it is larger than the sum of its proper divisors (1).

64555199 is an equidigital number, since it uses as much as digits as its factorization.

64555199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 243000, while the sum is 44.

The square root of 64555199 is about 8034.6250068065. The cubic root of 64555199 is about 401.1533359278.

The spelling of 64555199 in words is "sixty-four million, five hundred fifty-five thousand, one hundred ninety-nine".