1964144856 has 64 divisors (see below), whose sum is σ = 5001822720. Its totient is φ = 642568320.

The previous prime is 1964144837. The next prime is 1964144863. The reversal of 1964144856 is 6584414691.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 823041 + ... + 825423.

It is an arithmetic number, because the mean of its divisors is an integer number (78153480).

Almost surely, 2^1964144856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1964144856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2500911360).

1964144856 is an abundant number, since it is smaller than the sum of its proper divisors (3037677864).

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

1964144856 is a wasteful number, since it uses less digits than its factorization.

1964144856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3016 (or 3012 counting only the distinct ones).

The product of its digits is 829440, while the sum is 48.

The square root of 1964144856 is about 44318.6738971283. The cubic root of 1964144856 is about 1252.3464950260.

The spelling of 1964144856 in words is "one billion, nine hundred sixty-four million, one hundred forty-four thousand, eight hundred fifty-six".