85554499047181 has 2 divisors, whose sum is σ = 85554499047182. Its totient is φ = 85554499047180.

The previous prime is 85554499047167. The next prime is 85554499047203. The reversal of 85554499047181 is 18174099445558.

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., 77787637272900 + 7766861774281 = 8819730^2 + 2786909^2 .

It is a cyclic number.

It is not a de Polignac number, because 85554499047181 - 2¹³ = 85554499038989 is a prime.

It is a super-2 number, since 2×85554499047181² (a number of 29 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 85554499047181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85554499047881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42777249523590 + 42777249523591.

It is an arithmetic number, because the mean of its divisors is an integer number (42777249523591).

Almost surely, 2^{85554499047181} is an apocalyptic number.

It is an amenable number.

85554499047181 is a deficient number, since it is larger than the sum of its proper divisors (1).

85554499047181 is an equidigital number, since it uses as much as digits as its factorization.

85554499047181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304000, while the sum is 70.

The spelling of 85554499047181 in words is "eighty-five trillion, five hundred fifty-four billion, four hundred ninety-nine million, forty-seven thousand, one hundred eighty-one".