3561131339501 has 2 divisors, whose sum is σ = 3561131339502. Its totient is φ = 3561131339500.

The previous prime is 3561131339471. The next prime is 3561131339561. The reversal of 3561131339501 is 1059331311653.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2002875952900 + 1558255386601 = 1415230^2 + 1248301^2 .

It is an emirp because it is prime and its reverse (1059331311653) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3561131339501 - 2²² = 3561127145197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3561131339561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1780565669750 + 1780565669751.

It is an arithmetic number, because the mean of its divisors is an integer number (1780565669751).

Almost surely, 2^{3561131339501} is an apocalyptic number.

It is an amenable number.

3561131339501 is a deficient number, since it is larger than the sum of its proper divisors (1).

3561131339501 is an equidigital number, since it uses as much as digits as its factorization.

3561131339501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 109350, while the sum is 41.

The spelling of 3561131339501 in words is "three trillion, five hundred sixty-one billion, one hundred thirty-one million, three hundred thirty-nine thousand, five hundred one".