37638512243 has 2 divisors, whose sum is σ = 37638512244. Its totient is φ = 37638512242.

The previous prime is 37638512239. The next prime is 37638512281. The reversal of 37638512243 is 34221583673.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 37638512243 - 2² = 37638512239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 37638512194 and 37638512203.

It is not a weakly prime, because it can be changed into another prime (37638502243) 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, 18819256121 + 18819256122.

It is an arithmetic number, because the mean of its divisors is an integer number (18819256122).

Almost surely, 2^37638512243 is an apocalyptic number.

37638512243 is a deficient number, since it is larger than the sum of its proper divisors (1).

37638512243 is an equidigital number, since it uses as much as digits as its factorization.

37638512243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 44.

The spelling of 37638512243 in words is "thirty-seven billion, six hundred thirty-eight million, five hundred twelve thousand, two hundred forty-three".