38656641540081 has 48 divisors (see below), whose sum is σ = 55070374008320. Its totient is φ = 24114631495680.

The previous prime is 38656641540059. The next prime is 38656641540107. The reversal of 38656641540081 is 18004514665683.

It is a happy number.

It is not a de Polignac number, because 38656641540081 - 2⁷ = 38656641539953 is a prime.

It is a super-3 number, since 3×38656641540081³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38656641540001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 126678435 + ... + 126983223.

Almost surely, 2^{38656641540081} is an apocalyptic number.

It is an amenable number.

38656641540081 is a deficient number, since it is larger than the sum of its proper divisors (16413732468239).

38656641540081 is a wasteful number, since it uses less digits than its factorization.

38656641540081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305674 (or 305657 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 57.

The spelling of 38656641540081 in words is "thirty-eight trillion, six hundred fifty-six billion, six hundred forty-one million, five hundred forty thousand, eighty-one".