2811138945 has 16 divisors (see below), whose sum is σ = 4571558592. Its totient is φ = 1474695360.

The previous prime is 2811138943. The next prime is 2811138971. The reversal of 2811138945 is 5498311182.

It is not a de Polignac number, because 2811138945 - 2¹ = 2811138943 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2811138897 and 2811138906.

It is not an unprimeable number, because it can be changed into a prime (2811138943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1535227 + ... + 1537056.

It is an arithmetic number, because the mean of its divisors is an integer number (285722412).

Almost surely, 2^2811138945 is an apocalyptic number.

It is an amenable number.

2811138945 is a deficient number, since it is larger than the sum of its proper divisors (1760419647).

2811138945 is a wasteful number, since it uses less digits than its factorization.

2811138945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3072352.

The product of its digits is 69120, while the sum is 42.

The square root of 2811138945 is about 53020.1748865467. The cubic root of 2811138945 is about 1411.3263084852.

The spelling of 2811138945 in words is "two billion, eight hundred eleven million, one hundred thirty-eight thousand, nine hundred forty-five".