1995044845 has 4 divisors (see below), whose sum is σ = 2394053820. Its totient is φ = 1596035872.

The previous prime is 1995044839. The next prime is 1995044867. The reversal of 1995044845 is 5484405991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5484405991 = 683 ⋅8029877.

It can be written as a sum of positive squares in 2 ways, for example, as 516334729 + 1478710116 = 22723^2 + 38454^2 .

It is a cyclic number.

It is not a de Polignac number, because 1995044845 - 2³ = 1995044837 is a prime.

It is a super-2 number, since 2×1995044845² = 7960407867122148050, 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 (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199504480 + ... + 199504489.

It is an arithmetic number, because the mean of its divisors is an integer number (598513455).

Almost surely, 2^1995044845 is an apocalyptic number.

It is an amenable number.

1995044845 is a deficient number, since it is larger than the sum of its proper divisors (399008975).

1995044845 is an equidigital number, since it uses as much as digits as its factorization.

1995044845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399008974.

The product of its (nonzero) digits is 1036800, while the sum is 49.

The square root of 1995044845 is about 44665.9248756812. The cubic root of 1995044845 is about 1258.8796720410.

The spelling of 1995044845 in words is "one billion, nine hundred ninety-five million, forty-four thousand, eight hundred forty-five".