10518780197 has 2 divisors, whose sum is σ = 10518780198. Its totient is φ = 10518780196.

The previous prime is 10518780169. The next prime is 10518780227. The reversal of 10518780197 is 79108781501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10512195841 + 6584356 = 102529^2 + 2566^2 .

It is a cyclic number.

It is not a de Polignac number, because 10518780197 - 2⁸ = 10518779941 is a prime.

It is a super-2 number, since 2×10518780197² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10518710197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5259390098 + 5259390099.

It is an arithmetic number, because the mean of its divisors is an integer number (5259390099).

Almost surely, 2^10518780197 is an apocalyptic number.

It is an amenable number.

10518780197 is a deficient number, since it is larger than the sum of its proper divisors (1).

10518780197 is an equidigital number, since it uses as much as digits as its factorization.

10518780197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 47.

The spelling of 10518780197 in words is "ten billion, five hundred eighteen million, seven hundred eighty thousand, one hundred ninety-seven".