1964945165 has 12 divisors (see below), whose sum is σ = 2364211836. Its totient is φ = 1567781568.

The previous prime is 1964945149. The next prime is 1964945167. The reversal of 1964945165 is 5615494691.

It can be written as a sum of positive squares in 2 ways, for example, as 666207721 + 1298737444 = 25811^2 + 36038^2 .

It is not a de Polignac number, because 1964945165 - 2⁴ = 1964945149 is a prime.

It is a super-2 number, since 2×1964945165² = 7722019002913754450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1964945167) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1185017 + ... + 1186673.

It is an arithmetic number, because the mean of its divisors is an integer number (197017653).

Almost surely, 2^1964945165 is an apocalyptic number.

It is an amenable number.

1964945165 is a deficient number, since it is larger than the sum of its proper divisors (399266671).

1964945165 is an frugal number, since it uses more digits than its factorization.

1964945165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2636 (or 2149 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 50.

The square root of 1964945165 is about 44327.7020045028. The cubic root of 1964945165 is about 1252.5165653192.

The spelling of 1964945165 in words is "one billion, nine hundred sixty-four million, nine hundred forty-five thousand, one hundred sixty-five".