188494671881081 has 2 divisors, whose sum is σ = 188494671881082. Its totient is φ = 188494671881080.

The previous prime is 188494671881063. The next prime is 188494671881099. The reversal of 188494671881081 is 180188176494881.

It is a balanced prime because it is at equal distance from previous prime (188494671881063) and next prime (188494671881099).

It can be written as a sum of positive squares in only one way, i.e., 184370665395856 + 4124006485225 = 13578316^2 + 2030765^2 .

It is a cyclic number.

It is not a de Polignac number, because 188494671881081 - 2⁴² = 184096625369977 is a prime.

It is a super-2 number, since 2×188494671881081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (188494671881381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94247335940540 + 94247335940541.

It is an arithmetic number, because the mean of its divisors is an integer number (94247335940541).

Almost surely, 2^{188494671881081} is an apocalyptic number.

It is an amenable number.

188494671881081 is a deficient number, since it is larger than the sum of its proper divisors (1).

188494671881081 is an equidigital number, since it uses as much as digits as its factorization.

188494671881081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 198180864, while the sum is 74.

The spelling of 188494671881081 in words is "one hundred eighty-eight trillion, four hundred ninety-four billion, six hundred seventy-one million, eight hundred eighty-one thousand, eighty-one".