2611661042 has 4 divisors (see below), whose sum is σ = 3917491566. Its totient is φ = 1305830520.

The previous prime is 2611661011. The next prime is 2611661047. The reversal of 2611661042 is 2401661162.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1893903361 + 717757681 = 43519^2 + 26791^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2611660996 and 2611661014.

It is not an unprimeable number, because it can be changed into a prime (2611661047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652915259 + ... + 652915262.

Almost surely, 2^2611661042 is an apocalyptic number.

2611661042 is a deficient number, since it is larger than the sum of its proper divisors (1305830524).

2611661042 is a wasteful number, since it uses less digits than its factorization.

2611661042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305830523.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 2611661042 is about 51104.4131362449. The cubic root of 2611661042 is about 1377.1215367341.

The spelling of 2611661042 in words is "two billion, six hundred eleven million, six hundred sixty-one thousand, forty-two".