3561661198133 has 4 divisors (see below), whose sum is σ = 3561665039808. Its totient is φ = 3561657356460.

The previous prime is 3561661198129. The next prime is 3561661198153. The reversal of 3561661198133 is 3318911661653.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3561661198133 - 2² = 3561661198129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3561661198153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423860 + ... + 2702402.

It is an arithmetic number, because the mean of its divisors is an integer number (890416259952).

Almost surely, 2^{3561661198133} is an apocalyptic number.

It is an amenable number.

3561661198133 is a deficient number, since it is larger than the sum of its proper divisors (3841675).

3561661198133 is a wasteful number, since it uses less digits than its factorization.

3561661198133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3841674.

The product of its digits is 2099520, while the sum is 53.

The spelling of 3561661198133 in words is "three trillion, five hundred sixty-one billion, six hundred sixty-one million, one hundred ninety-eight thousand, one hundred thirty-three".