1545180161 has 18 divisors (see below), whose sum is σ = 1843396758. Its totient is φ = 1290663360.

The previous prime is 1545180137. The next prime is 1545180191. The reversal of 1545180161 is 1610815451.

It can be written as a sum of positive squares in 3 ways, for example, as 339701761 + 1205478400 = 18431^2 + 34720^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1545180161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1545180191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1761455 + ... + 1762331.

It is an arithmetic number, because the mean of its divisors is an integer number (102410931).

Almost surely, 2^1545180161 is an apocalyptic number.

It is an amenable number.

1545180161 is a deficient number, since it is larger than the sum of its proper divisors (298216597).

1545180161 is an frugal number, since it uses more digits than its factorization.

1545180161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809 (or 925 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 32.

The square root of 1545180161 is about 39308.7796936003. The cubic root of 1545180161 is about 1156.0937175829.

The spelling of 1545180161 in words is "one billion, five hundred forty-five million, one hundred eighty thousand, one hundred sixty-one".