6598457861 has 2 divisors, whose sum is σ = 6598457862. Its totient is φ = 6598457860.

The previous prime is 6598457851. The next prime is 6598457867. The reversal of 6598457861 is 1687548956.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3611288836 + 2987169025 = 60094^2 + 54655^2 .

It is a cyclic number.

It is not a de Polignac number, because 6598457861 - 2⁶ = 6598457797 is a prime.

It is a super-2 number, since 2×6598457861² = 87079292286785390642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6598457861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6598457867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3299228930 + 3299228931.

It is an arithmetic number, because the mean of its divisors is an integer number (3299228931).

Almost surely, 2^6598457861 is an apocalyptic number.

It is an amenable number.

6598457861 is a deficient number, since it is larger than the sum of its proper divisors (1).

6598457861 is an equidigital number, since it uses as much as digits as its factorization.

6598457861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14515200, while the sum is 59.

The square root of 6598457861 is about 81230.8922824316. The cubic root of 6598457861 is about 1875.6313475437.

The spelling of 6598457861 in words is "six billion, five hundred ninety-eight million, four hundred fifty-seven thousand, eight hundred sixty-one".