3661904242 has 4 divisors (see below), whose sum is σ = 5492856366. Its totient is φ = 1830952120.

The previous prime is 3661904203. The next prime is 3661904287. The reversal of 3661904242 is 2424091663.

It is a happy number.

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., 2092239081 + 1569665161 = 45741^2 + 39619^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 915476059 + ... + 915476062.

Almost surely, 2^3661904242 is an apocalyptic number.

3661904242 is a deficient number, since it is larger than the sum of its proper divisors (1830952124).

3661904242 is a wasteful number, since it uses less digits than its factorization.

3661904242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830952123.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 3661904242 is about 60513.6698771443. The cubic root of 3661904242 is about 1541.3537657460.

The spelling of 3661904242 in words is "three billion, six hundred sixty-one million, nine hundred four thousand, two hundred forty-two".