3561966974851 has 4 divisors (see below), whose sum is σ = 3597233974704. Its totient is φ = 3526699975000.

The previous prime is 3561966974837. The next prime is 3561966974857. The reversal of 3561966974851 is 1584796691653.

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

It is a cyclic number.

It is not a de Polignac number, because 3561966974851 - 2¹⁹ = 3561966450563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3561966974857) 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, 17633499775 + ... + 17633499976.

It is an arithmetic number, because the mean of its divisors is an integer number (899308493676).

Almost surely, 2^{3561966974851} is an apocalyptic number.

3561966974851 is a deficient number, since it is larger than the sum of its proper divisors (35266999853).

3561966974851 is a wasteful number, since it uses less digits than its factorization.

3561966974851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35266999852.

The product of its digits is 293932800, while the sum is 70.

The spelling of 3561966974851 in words is "three trillion, five hundred sixty-one billion, nine hundred sixty-six million, nine hundred seventy-four thousand, eight hundred fifty-one".