64815773711087 has 24 divisors (see below), whose sum is σ = 75488884289280. Its totient is φ = 55489383512640.

The previous prime is 64815773711083. The next prime is 64815773711089. The reversal of 64815773711087 is 78011737751846.

It is not a de Polignac number, because 64815773711087 - 2² = 64815773711083 is a prime.

It is a super-2 number, since 2×64815773711087² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64815773711083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 333593714 + ... + 333787952.

It is an arithmetic number, because the mean of its divisors is an integer number (3145370178720).

Almost surely, 2^{64815773711087} is an apocalyptic number.

64815773711087 is a deficient number, since it is larger than the sum of its proper divisors (10673110578193).

64815773711087 is a wasteful number, since it uses less digits than its factorization.

64815773711087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202431 (or 202424 counting only the distinct ones).

The product of its (nonzero) digits is 55319040, while the sum is 65.

The spelling of 64815773711087 in words is "sixty-four trillion, eight hundred fifteen billion, seven hundred seventy-three million, seven hundred eleven thousand, eighty-seven".