3561131281027 has 2 divisors, whose sum is σ = 3561131281028. Its totient is φ = 3561131281026.

The previous prime is 3561131281007. The next prime is 3561131281073. The reversal of 3561131281027 is 7201821311653.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3561131281027 - 2⁷ = 3561131280899 is a prime.

It is not a weakly prime, because it can be changed into another prime (3561131281007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1780565640513 + 1780565640514.

It is an arithmetic number, because the mean of its divisors is an integer number (1780565640514).

Almost surely, 2^{3561131281027} is an apocalyptic number.

3561131281027 is a deficient number, since it is larger than the sum of its proper divisors (1).

3561131281027 is an equidigital number, since it uses as much as digits as its factorization.

3561131281027 is an evil number, because the sum of its binary digits is even.

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

The spelling of 3561131281027 in words is "three trillion, five hundred sixty-one billion, one hundred thirty-one million, two hundred eighty-one thousand, twenty-seven".