64378685327 has 32 divisors (see below), whose sum is σ = 71994173760. Its totient is φ = 57077637120.

The previous prime is 64378685299. The next prime is 64378685351. The reversal of 64378685327 is 72358687346.

It is not a de Polignac number, because 64378685327 - 2²⁰ = 64377636751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64378685377) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73407413 + ... + 73408289.

It is an arithmetic number, because the mean of its divisors is an integer number (2249817930).

Almost surely, 2^64378685327 is an apocalyptic number.

64378685327 is a deficient number, since it is larger than the sum of its proper divisors (7615488433).

64378685327 is a wasteful number, since it uses less digits than its factorization.

64378685327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1883.

The product of its digits is 40642560, while the sum is 59.

The spelling of 64378685327 in words is "sixty-four billion, three hundred seventy-eight million, six hundred eighty-five thousand, three hundred twenty-seven".