37391274781813 has 2 divisors, whose sum is σ = 37391274781814. Its totient is φ = 37391274781812.

The previous prime is 37391274781789. The next prime is 37391274781901. The reversal of 37391274781813 is 31818747219373.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33031894086244 + 4359380695569 = 5747338^2 + 2087913^2 .

It is a cyclic number.

It is not a de Polignac number, because 37391274781813 - 2¹³ = 37391274773621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37391274781613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18695637390906 + 18695637390907.

It is an arithmetic number, because the mean of its divisors is an integer number (18695637390907).

Almost surely, 2^{37391274781813} is an apocalyptic number.

It is an amenable number.

37391274781813 is a deficient number, since it is larger than the sum of its proper divisors (1).

37391274781813 is an equidigital number, since it uses as much as digits as its factorization.

37391274781813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42674688, while the sum is 64.

The spelling of 37391274781813 in words is "thirty-seven trillion, three hundred ninety-one billion, two hundred seventy-four million, seven hundred eighty-one thousand, eight hundred thirteen".