47109142081 has 2 divisors, whose sum is σ = 47109142082. Its totient is φ = 47109142080.

The previous prime is 47109142027. The next prime is 47109142103. The reversal of 47109142081 is 18024190174.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30595607056 + 16513535025 = 174916^2 + 128505^2 .

It is a cyclic number.

It is not a de Polignac number, because 47109142081 - 2¹³ = 47109133889 is a prime.

It is a super-2 number, since 2×47109142081² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 47109142081.

It is not a weakly prime, because it can be changed into another prime (47109142021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23554571040 + 23554571041.

It is an arithmetic number, because the mean of its divisors is an integer number (23554571041).

Almost surely, 2^47109142081 is an apocalyptic number.

It is an amenable number.

47109142081 is a deficient number, since it is larger than the sum of its proper divisors (1).

47109142081 is an equidigital number, since it uses as much as digits as its factorization.

47109142081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 37.

The spelling of 47109142081 in words is "forty-seven billion, one hundred nine million, one hundred forty-two thousand, eighty-one".