499897077181 has 2 divisors, whose sum is σ = 499897077182. Its totient is φ = 499897077180.

The previous prime is 499897077149. The next prime is 499897077217. The reversal of 499897077181 is 181770798994.

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., 499897077156 + 25 = 707034^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 499897077181 - 2⁵ = 499897077149 is a prime.

It is a super-2 number, since 2×499897077181² (a number of 24 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 499897077181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499897071181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249948538590 + 249948538591.

It is an arithmetic number, because the mean of its divisors is an integer number (249948538591).

Almost surely, 2^499897077181 is an apocalyptic number.

It is an amenable number.

499897077181 is a deficient number, since it is larger than the sum of its proper divisors (1).

499897077181 is an equidigital number, since it uses as much as digits as its factorization.

499897077181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64012032, while the sum is 70.

The spelling of 499897077181 in words is "four hundred ninety-nine billion, eight hundred ninety-seven million, seventy-seven thousand, one hundred eighty-one".