64163220619 has 4 divisors (see below), whose sum is σ = 64168974496. Its totient is φ = 64157466744.

The previous prime is 64163220617. The next prime is 64163220637. The reversal of 64163220619 is 91602236146.

64163220619 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91602236146 = 2 ⋅45801118073.

It is a cyclic number.

It is not a de Polignac number, because 64163220619 - 2¹ = 64163220617 is a prime.

It is a super-2 number, since 2×64163220619² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64163220617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2860179 + ... + 2882524.

It is an arithmetic number, because the mean of its divisors is an integer number (16042243624).

Almost surely, 2^64163220619 is an apocalyptic number.

64163220619 is a deficient number, since it is larger than the sum of its proper divisors (5753877).

64163220619 is a wasteful number, since it uses less digits than its factorization.

64163220619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5753876.

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 64163220619 in words is "sixty-four billion, one hundred sixty-three million, two hundred twenty thousand, six hundred nineteen".