188455227481 has 2 divisors, whose sum is σ = 188455227482. Its totient is φ = 188455227480.

The previous prime is 188455227461. The next prime is 188455227491. The reversal of 188455227481 is 184722554881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150699240000 + 37755987481 = 388200^2 + 194309^2 .

It is a cyclic number.

It is not a de Polignac number, because 188455227481 - 2⁵ = 188455227449 is a prime.

It is a super-2 number, since 2×188455227481² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (188455227461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94227613740 + 94227613741.

It is an arithmetic number, because the mean of its divisors is an integer number (94227613741).

Almost surely, 2^188455227481 is an apocalyptic number.

It is an amenable number.

188455227481 is a deficient number, since it is larger than the sum of its proper divisors (1).

188455227481 is an equidigital number, since it uses as much as digits as its factorization.

188455227481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5734400, while the sum is 55.

The spelling of 188455227481 in words is "one hundred eighty-eight billion, four hundred fifty-five million, two hundred twenty-seven thousand, four hundred eighty-one".