2861291545 has 24 divisors (see below), whose sum is σ = 3997529928. Its totient is φ = 1960358400.

The previous prime is 2861291513. The next prime is 2861291561. The reversal of 2861291545 is 5451921682.

It can be written as a sum of positive squares in 4 ways, for example, as 166435801 + 2694855744 = 12901^2 + 51912^2 .

It is not a de Polignac number, because 2861291545 - 2⁵ = 2861291513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 329155 + ... + 337735.

It is an arithmetic number, because the mean of its divisors is an integer number (166563747).

Almost surely, 2^2861291545 is an apocalyptic number.

It is an amenable number.

2861291545 is a deficient number, since it is larger than the sum of its proper divisors (1136238383).

2861291545 is a wasteful number, since it uses less digits than its factorization.

2861291545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9961 (or 9954 counting only the distinct ones).

The product of its digits is 172800, while the sum is 43.

The square root of 2861291545 is about 53491.0417266293. The cubic root of 2861291545 is about 1419.6698870602.

The spelling of 2861291545 in words is "two billion, eight hundred sixty-one million, two hundred ninety-one thousand, five hundred forty-five".