64878569819 has 16 divisors (see below), whose sum is σ = 74295883200. Its totient is φ = 55498604544.

The previous prime is 64878569761. The next prime is 64878569831. The reversal of 64878569819 is 91896587846.

64878569819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 64878569819 - 2¹⁶ = 64878504283 is a prime.

It is a super-2 number, since 2×64878569819² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64878569879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9626819 + ... + 9633555.

It is an arithmetic number, because the mean of its divisors is an integer number (4643492700).

Almost surely, 2^64878569819 is an apocalyptic number.

64878569819 is a deficient number, since it is larger than the sum of its proper divisors (9417313381).

64878569819 is a wasteful number, since it uses less digits than its factorization.

64878569819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9302.

The product of its digits is 209018880, while the sum is 71.

The spelling of 64878569819 in words is "sixty-four billion, eight hundred seventy-eight million, five hundred sixty-nine thousand, eight hundred nineteen".