37125530581 has 2 divisors, whose sum is σ = 37125530582. Its totient is φ = 37125530580.

The previous prime is 37125530557. The next prime is 37125530623. The reversal of 37125530581 is 18503552173.

37125530581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30691886481 + 6433644100 = 175191^2 + 80210^2 .

It is a cyclic number.

It is not a de Polignac number, because 37125530581 - 2¹¹ = 37125528533 is a prime.

It is a super-2 number, since 2×37125530581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37125530501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18562765290 + 18562765291.

It is an arithmetic number, because the mean of its divisors is an integer number (18562765291).

Almost surely, 2^37125530581 is an apocalyptic number.

It is an amenable number.

37125530581 is a deficient number, since it is larger than the sum of its proper divisors (1).

37125530581 is an equidigital number, since it uses as much as digits as its factorization.

37125530581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 37125530581 in words is "thirty-seven billion, one hundred twenty-five million, five hundred thirty thousand, five hundred eighty-one".