1573995161 has 4 divisors (see below), whose sum is σ = 1579677732. Its totient is φ = 1568312592.

The previous prime is 1573995149. The next prime is 1573995197. The reversal of 1573995161 is 1615993751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1615993751 = 29983 ⋅53897.

It can be written as a sum of positive squares in 2 ways, for example, as 173738761 + 1400256400 = 13181^2 + 37420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1573995161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1573998161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2840870 + ... + 2841423.

It is an arithmetic number, because the mean of its divisors is an integer number (394919433).

Almost surely, 2^1573995161 is an apocalyptic number.

It is an amenable number.

1573995161 is a deficient number, since it is larger than the sum of its proper divisors (5682571).

1573995161 is an equidigital number, since it uses as much as digits as its factorization.

1573995161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5682570.

The product of its digits is 255150, while the sum is 47.

The square root of 1573995161 is about 39673.6078646750. The cubic root of 1573995161 is about 1163.2359016621.

The spelling of 1573995161 in words is "one billion, five hundred seventy-three million, nine hundred ninety-five thousand, one hundred sixty-one".