64522356818378 has 32 divisors (see below), whose sum is σ = 97085813856768. Its totient is φ = 32160605276800.

The previous prime is 64522356818363. The next prime is 64522356818453. The reversal of 64522356818378 is 87381865322546.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3189271523 + ... + 3189291753.

It is an arithmetic number, because the mean of its divisors is an integer number (3033931683024).

Almost surely, 2^{64522356818378} is an apocalyptic number.

64522356818378 is a deficient number, since it is larger than the sum of its proper divisors (32563457038390).

64522356818378 is a wasteful number, since it uses less digits than its factorization.

64522356818378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24598.

The product of its digits is 464486400, while the sum is 68.

The spelling of 64522356818378 in words is "sixty-four trillion, five hundred twenty-two billion, three hundred fifty-six million, eight hundred eighteen thousand, three hundred seventy-eight".