2811661442 has 16 divisors (see below), whose sum is σ = 4242698520. Its totient is φ = 1397440512.

The previous prime is 2811661417. The next prime is 2811661481. The reversal of 2811661442 is 2441661182.

It can be written as a sum of positive squares in 4 ways, for example, as 1582527961 + 1229133481 = 39781^2 + 35059^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 721034 + ... + 724922.

Almost surely, 2^2811661442 is an apocalyptic number.

2811661442 is a deficient number, since it is larger than the sum of its proper divisors (1431037078).

2811661442 is a wasteful number, since it uses less digits than its factorization.

2811661442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5957.

The product of its digits is 18432, while the sum is 35.

The square root of 2811661442 is about 53025.1019989589. The cubic root of 2811661442 is about 1411.4137425697.

The spelling of 2811661442 in words is "two billion, eight hundred eleven million, six hundred sixty-one thousand, four hundred forty-two".