3113633437561 has 4 divisors (see below), whose sum is σ = 3113639220132. Its totient is φ = 3113627654992.

The previous prime is 3113633437531. The next prime is 3113633437583. The reversal of 3113633437561 is 1657343363113.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2061406777600 + 1052226659961 = 1435760^2 + 1025781^2 .

It is a cyclic number.

It is not a de Polignac number, because 3113633437561 - 2⁷ = 3113633437433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3113633437531) 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, 1989946 + ... + 3191731.

It is an arithmetic number, because the mean of its divisors is an integer number (778409805033).

Almost surely, 2^{3113633437561} is an apocalyptic number.

It is an amenable number.

3113633437561 is a deficient number, since it is larger than the sum of its proper divisors (5782571).

3113633437561 is an equidigital number, since it uses as much as digits as its factorization.

3113633437561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5782570.

The product of its digits is 1224720, while the sum is 46.

The spelling of 3113633437561 in words is "three trillion, one hundred thirteen billion, six hundred thirty-three million, four hundred thirty-seven thousand, five hundred sixty-one".