3712445711581 has 2 divisors, whose sum is σ = 3712445711582. Its totient is φ = 3712445711580.

The previous prime is 3712445711561. The next prime is 3712445711603. The reversal of 3712445711581 is 1851175442173.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3707708142681 + 4737568900 = 1925541^2 + 68830^2 .

It is a cyclic number.

It is not a de Polignac number, because 3712445711581 - 2⁷ = 3712445711453 is a prime.

It is a super-2 number, since 2×3712445711581² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3712445711561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1856222855790 + 1856222855791.

It is an arithmetic number, because the mean of its divisors is an integer number (1856222855791).

Almost surely, 2^{3712445711581} is an apocalyptic number.

It is an amenable number.

3712445711581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3712445711581 is an equidigital number, since it uses as much as digits as its factorization.

3712445711581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 940800, while the sum is 49.

The spelling of 3712445711581 in words is "three trillion, seven hundred twelve billion, four hundred forty-five million, seven hundred eleven thousand, five hundred eighty-one".