37991856713 has 2 divisors, whose sum is σ = 37991856714. Its totient is φ = 37991856712.

The previous prime is 37991856709. The next prime is 37991856731. The reversal of 37991856713 is 31765819973.

Together with next prime (37991856731) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37555339264 + 436517449 = 193792^2 + 20893^2 .

It is a cyclic number.

It is not a de Polignac number, because 37991856713 - 2² = 37991856709 is a prime.

It is a super-2 number, since 2×37991856713² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (37991756713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18995928356 + 18995928357.

It is an arithmetic number, because the mean of its divisors is an integer number (18995928357).

Almost surely, 2^37991856713 is an apocalyptic number.

It is an amenable number.

37991856713 is a deficient number, since it is larger than the sum of its proper divisors (1).

37991856713 is an equidigital number, since it uses as much as digits as its factorization.

37991856713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8573040, while the sum is 59.

The spelling of 37991856713 in words is "thirty-seven billion, nine hundred ninety-one million, eight hundred fifty-six thousand, seven hundred thirteen".