64063978423 has 8 divisors (see below), whose sum is σ = 67844448720. Its totient is φ = 60284841600.

The previous prime is 64063978399. The next prime is 64063978453. The reversal of 64063978423 is 32487936046.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64063978423 - 2¹³ = 64063970231 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 (64063978453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233593 + ... + 427426.

It is an arithmetic number, because the mean of its divisors is an integer number (8480556090).

Almost surely, 2^64063978423 is an apocalyptic number.

64063978423 is a deficient number, since it is larger than the sum of its proper divisors (3780470297).

64063978423 is a wasteful number, since it uses less digits than its factorization.

64063978423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666737.

The product of its (nonzero) digits is 5225472, while the sum is 52.

The spelling of 64063978423 in words is "sixty-four billion, sixty-three million, nine hundred seventy-eight thousand, four hundred twenty-three".