3561604494729 has 4 divisors (see below), whose sum is σ = 4748805992976. Its totient is φ = 2374402996484.

The previous prime is 3561604494713. The next prime is 3561604494737. The reversal of 3561604494729 is 9274944061653.

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.

It is a cyclic number.

It is not a de Polignac number, because 3561604494729 - 2⁴ = 3561604494713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3561604494709) 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, 593600749119 + ... + 593600749124.

It is an arithmetic number, because the mean of its divisors is an integer number (1187201498244).

Almost surely, 2^{3561604494729} is an apocalyptic number.

It is an amenable number.

3561604494729 is a deficient number, since it is larger than the sum of its proper divisors (1187201498247).

3561604494729 is a wasteful number, since it uses less digits than its factorization.

3561604494729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187201498246.

The product of its (nonzero) digits is 39191040, while the sum is 60.

The spelling of 3561604494729 in words is "three trillion, five hundred sixty-one billion, six hundred four million, four hundred ninety-four thousand, seven hundred twenty-nine".