1964144855 has 12 divisors (see below), whose sum is σ = 2481570840. Its totient is φ = 1488287664.

The previous prime is 1964144837. The next prime is 1964144863. The reversal of 1964144855 is 5584414691.

It is not a de Polignac number, because 1964144855 - 2⁸ = 1964144599 is a prime.

It is a super-2 number, since 2×1964144855² = 7715730022845942050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 429692 + ... + 434238.

It is an arithmetic number, because the mean of its divisors is an integer number (206797570).

Almost surely, 2^1964144855 is an apocalyptic number.

1964144855 is a deficient number, since it is larger than the sum of its proper divisors (517425985).

1964144855 is an frugal number, since it uses more digits than its factorization.

1964144855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9118 (or 4571 counting only the distinct ones).

The product of its digits is 691200, while the sum is 47.

The square root of 1964144855 is about 44318.6738858464. The cubic root of 1964144855 is about 1252.3464948134.

The spelling of 1964144855 in words is "one billion, nine hundred sixty-four million, one hundred forty-four thousand, eight hundred fifty-five".