47585242161581 has 2 divisors, whose sum is σ = 47585242161582. Its totient is φ = 47585242161580.

The previous prime is 47585242161571. The next prime is 47585242161607. The reversal of 47585242161581 is 18516124258574.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47512539128356 + 72703033225 = 6892934^2 + 269635^2 .

It is a cyclic number.

It is not a de Polignac number, because 47585242161581 - 2⁶ = 47585242161517 is a prime.

It is a super-2 number, since 2×47585242161581² (a number of 28 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 47585242161581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47585242161521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23792621080790 + 23792621080791.

It is an arithmetic number, because the mean of its divisors is an integer number (23792621080791).

Almost surely, 2^{47585242161581} is an apocalyptic number.

It is an amenable number.

47585242161581 is a deficient number, since it is larger than the sum of its proper divisors (1).

47585242161581 is an equidigital number, since it uses as much as digits as its factorization.

47585242161581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504000, while the sum is 59.

The spelling of 47585242161581 in words is "forty-seven trillion, five hundred eighty-five billion, two hundred forty-two million, one hundred sixty-one thousand, five hundred eighty-one".