37818063687649 has 4 divisors (see below), whose sum is σ = 43220644214464. Its totient is φ = 32415483160836.

The previous prime is 37818063687637. The next prime is 37818063687671. The reversal of 37818063687649 is 94678636081873.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 37818063687649 - 2²¹ = 37818061590497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37818063687949) 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 in 3 ways as a sum of consecutive naturals, for example, 2701290263397 + ... + 2701290263410.

It is an arithmetic number, because the mean of its divisors is an integer number (10805161053616).

Almost surely, 2^{37818063687649} is an apocalyptic number.

It is an amenable number.

37818063687649 is a deficient number, since it is larger than the sum of its proper divisors (5402580526815).

37818063687649 is an equidigital number, since it uses as much as digits as its factorization.

37818063687649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5402580526814.

The product of its (nonzero) digits is 1755758592, while the sum is 76.

The spelling of 37818063687649 in words is "thirty-seven trillion, eight hundred eighteen billion, sixty-three million, six hundred eighty-seven thousand, six hundred forty-nine".