64219145219 has 4 divisors (see below), whose sum is σ = 64325999640. Its totient is φ = 64112290800.

The previous prime is 64219145191. The next prime is 64219145231. The reversal of 64219145219 is 91254191246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91254191246 = 2 ⋅45627095623.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64219145219 is a prime.

It is a super-2 number, since 2×64219145219² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64219145219.

It is not an unprimeable number, because it can be changed into a prime (64219145239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53426309 + ... + 53427510.

It is an arithmetic number, because the mean of its divisors is an integer number (16081499910).

Almost surely, 2^64219145219 is an apocalyptic number.

64219145219 is a deficient number, since it is larger than the sum of its proper divisors (106854421).

64219145219 is a wasteful number, since it uses less digits than its factorization.

64219145219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106854420.

The product of its digits is 155520, while the sum is 44.

The spelling of 64219145219 in words is "sixty-four billion, two hundred nineteen million, one hundred forty-five thousand, two hundred nineteen".