38297911081 has 2 divisors, whose sum is σ = 38297911082. Its totient is φ = 38297911080.

The previous prime is 38297911079. The next prime is 38297911153. The reversal of 38297911081 is 18011979283.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36503541481 + 1794369600 = 191059^2 + 42360^2 .

It is a cyclic number.

It is not a de Polignac number, because 38297911081 - 2¹ = 38297911079 is a prime.

It is a super-3 number, since 3×38297911081³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 38297911079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (38297911021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19148955540 + 19148955541.

It is an arithmetic number, because the mean of its divisors is an integer number (19148955541).

Almost surely, 2^38297911081 is an apocalyptic number.

It is an amenable number.

38297911081 is a deficient number, since it is larger than the sum of its proper divisors (1).

38297911081 is an equidigital number, since it uses as much as digits as its factorization.

38297911081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 49.

The spelling of 38297911081 in words is "thirty-eight billion, two hundred ninety-seven million, nine hundred eleven thousand, eighty-one".