64078591 has 2 divisors, whose sum is σ = 64078592. Its totient is φ = 64078590.

The previous prime is 64078589. The next prime is 64078601. The reversal of 64078591 is 19587046.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64078591 - 2¹ = 64078589 is a prime.

Together with 64078589, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64078501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32039295 + 32039296.

It is an arithmetic number, because the mean of its divisors is an integer number (32039296).

Almost surely, 2^64078591 is an apocalyptic number.

64078591 is a deficient number, since it is larger than the sum of its proper divisors (1).

64078591 is an equidigital number, since it uses as much as digits as its factorization.

64078591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 64078591 is about 8004.9104304795. The cubic root of 64078591 is about 400.1636642759.

The spelling of 64078591 in words is "sixty-four million, seventy-eight thousand, five hundred ninety-one".