64219925789 has 8 divisors (see below), whose sum is σ = 65946839040. Its totient is φ = 62512094736.

The previous prime is 64219925743. The next prime is 64219925831. The reversal of 64219925789 is 98752991246.

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 64219925789 - 2¹⁶ = 64219860253 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 (64219925489) 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, 4763729 + ... + 4777190.

It is an arithmetic number, because the mean of its divisors is an integer number (8243354880).

Almost surely, 2^64219925789 is an apocalyptic number.

It is an amenable number.

64219925789 is a deficient number, since it is larger than the sum of its proper divisors (1726913251).

64219925789 is a wasteful number, since it uses less digits than its factorization.

64219925789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9541099.

The product of its digits is 19595520, while the sum is 62.

The spelling of 64219925789 in words is "sixty-four billion, two hundred nineteen million, nine hundred twenty-five thousand, seven hundred eighty-nine".