3561131281072 has 20 divisors (see below), whose sum is σ = 6902708846176. Its totient is φ = 1779787062720.

The previous prime is 3561131281027. The next prime is 3561131281073. The reversal of 3561131281072 is 2701821311653.

It is not an unprimeable number, because it can be changed into a prime (3561131281073) 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, 48623379 + ... + 48696562.

Almost surely, 2^{3561131281072} is an apocalyptic number.

It is an amenable number.

3561131281072 is a deficient number, since it is larger than the sum of its proper divisors (3341577565104).

3561131281072 is a wasteful number, since it uses less digits than its factorization.

3561131281072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97322236 (or 97322230 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 3561131281072 in words is "three trillion, five hundred sixty-one billion, one hundred thirty-one million, two hundred eighty-one thousand, seventy-two".