38880775181 has 2 divisors, whose sum is σ = 38880775182. Its totient is φ = 38880775180.

The previous prime is 38880775091. The next prime is 38880775243. The reversal of 38880775181 is 18157708883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22996206025 + 15884569156 = 151645^2 + 126034^2 .

It is an emirp because it is prime and its reverse (18157708883) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38880775181 - 2²² = 38876580877 is a prime.

It is a super-2 number, since 2×38880775181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38880775481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19440387590 + 19440387591.

It is an arithmetic number, because the mean of its divisors is an integer number (19440387591).

Almost surely, 2^38880775181 is an apocalyptic number.

It is an amenable number.

38880775181 is a deficient number, since it is larger than the sum of its proper divisors (1).

38880775181 is an equidigital number, since it uses as much as digits as its factorization.

38880775181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3010560, while the sum is 56.

The spelling of 38880775181 in words is "thirty-eight billion, eight hundred eighty million, seven hundred seventy-five thousand, one hundred eighty-one".