38618231081 has 2 divisors, whose sum is σ = 38618231082. Its totient is φ = 38618231080.

The previous prime is 38618231053. The next prime is 38618231107. The reversal of 38618231081 is 18013281683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38096793856 + 521437225 = 195184^2 + 22835^2 .

It is a cyclic number.

It is not a de Polignac number, because 38618231081 - 2¹⁴ = 38618214697 is a prime.

It is a super-2 number, since 2×38618231081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38618231681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19309115540 + 19309115541.

It is an arithmetic number, because the mean of its divisors is an integer number (19309115541).

Almost surely, 2^38618231081 is an apocalyptic number.

It is an amenable number.

38618231081 is a deficient number, since it is larger than the sum of its proper divisors (1).

38618231081 is an equidigital number, since it uses as much as digits as its factorization.

38618231081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 41.

The spelling of 38618231081 in words is "thirty-eight billion, six hundred eighteen million, two hundred thirty-one thousand, eighty-one".