64144646862 has 64 divisors (see below), whose sum is σ = 132403299840. Its totient is φ = 20704320000.

The previous prime is 64144646833. The next prime is 64144646869. The reversal of 64144646862 is 26864644146.

It is a super-2 number, since 2×64144646862² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64144646869) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19324839 + ... + 19328157.

It is an arithmetic number, because the mean of its divisors is an integer number (2068801560).

Almost surely, 2^64144646862 is an apocalyptic number.

64144646862 is an abundant number, since it is smaller than the sum of its proper divisors (68258652978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64144646862 is a wasteful number, since it uses less digits than its factorization.

64144646862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3929.

The product of its digits is 5308416, while the sum is 51.

The spelling of 64144646862 in words is "sixty-four billion, one hundred forty-four million, six hundred forty-six thousand, eight hundred sixty-two".