37998518413 has 2 divisors, whose sum is σ = 37998518414. Its totient is φ = 37998518412.

The previous prime is 37998518387. The next prime is 37998518443. The reversal of 37998518413 is 31481589973.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35858345769 + 2140172644 = 189363^2 + 46262^2 .

It is an emirp because it is prime and its reverse (31481589973) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37998518413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37998518443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18999259206 + 18999259207.

It is an arithmetic number, because the mean of its divisors is an integer number (18999259207).

Almost surely, 2^37998518413 is an apocalyptic number.

It is an amenable number.

37998518413 is a deficient number, since it is larger than the sum of its proper divisors (1).

37998518413 is an equidigital number, since it uses as much as digits as its factorization.

37998518413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 58.

The spelling of 37998518413 in words is "thirty-seven billion, nine hundred ninety-eight million, five hundred eighteen thousand, four hundred thirteen".