64556383819 has 2 divisors, whose sum is σ = 64556383820. Its totient is φ = 64556383818.

The previous prime is 64556383811. The next prime is 64556383849. The reversal of 64556383819 is 91838365546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64556383819 - 2³ = 64556383811 is a prime.

It is a super-2 number, since 2×64556383819² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64556383811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32278191909 + 32278191910.

It is an arithmetic number, because the mean of its divisors is an integer number (32278191910).

Almost surely, 2^64556383819 is an apocalyptic number.

64556383819 is a deficient number, since it is larger than the sum of its proper divisors (1).

64556383819 is an equidigital number, since it uses as much as digits as its factorization.

64556383819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18662400, while the sum is 58.

The spelling of 64556383819 in words is "sixty-four billion, five hundred fifty-six million, three hundred eighty-three thousand, eight hundred nineteen".