1945764872 has 8 divisors (see below), whose sum is σ = 3648309150. Its totient is φ = 972882432.

The previous prime is 1945764859. The next prime is 1945764881. The reversal of 1945764872 is 2784675491.

It can be written as a sum of positive squares in only one way, i.e., 1550311876 + 395452996 = 39374^2 + 19886^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121610297 + ... + 121610312.

Almost surely, 2^1945764872 is an apocalyptic number.

It is an amenable number.

1945764872 is a deficient number, since it is larger than the sum of its proper divisors (1702544278).

1945764872 is a wasteful number, since it uses less digits than its factorization.

1945764872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243220615 (or 243220611 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 53.

The square root of 1945764872 is about 44110.8248846017. The cubic root of 1945764872 is about 1248.4278628969.

The spelling of 1945764872 in words is "one billion, nine hundred forty-five million, seven hundred sixty-four thousand, eight hundred seventy-two".