38616509631481 has 2 divisors, whose sum is σ = 38616509631482. Its totient is φ = 38616509631480.

The previous prime is 38616509631443. The next prime is 38616509631503. The reversal of 38616509631481 is 18413690561683.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23835437444025 + 14781072187456 = 4882155^2 + 3844616^2 .

It is a cyclic number.

It is not a de Polignac number, because 38616509631481 - 2⁷ = 38616509631353 is a prime.

It is a super-2 number, since 2×38616509631481² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38616509631181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19308254815740 + 19308254815741.

It is an arithmetic number, because the mean of its divisors is an integer number (19308254815741).

Almost surely, 2^{38616509631481} is an apocalyptic number.

It is an amenable number.

38616509631481 is a deficient number, since it is larger than the sum of its proper divisors (1).

38616509631481 is an equidigital number, since it uses as much as digits as its factorization.

38616509631481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22394880, while the sum is 61.

The spelling of 38616509631481 in words is "thirty-eight trillion, six hundred sixteen billion, five hundred nine million, six hundred thirty-one thousand, four hundred eighty-one".