4197768557 has 2 divisors, whose sum is σ = 4197768558. Its totient is φ = 4197768556.

The previous prime is 4197768539. The next prime is 4197768587. The reversal of 4197768557 is 7558677914.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4062022756 + 135745801 = 63734^2 + 11651^2 .

It is a cyclic number.

It is not a de Polignac number, because 4197768557 - 2⁶ = 4197768493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4197768496 and 4197768505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4197768527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2098884278 + 2098884279.

It is an arithmetic number, because the mean of its divisors is an integer number (2098884279).

Almost surely, 2^4197768557 is an apocalyptic number.

It is an amenable number.

4197768557 is a deficient number, since it is larger than the sum of its proper divisors (1).

4197768557 is an equidigital number, since it uses as much as digits as its factorization.

4197768557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14817600, while the sum is 59.

The square root of 4197768557 is about 64790.1887402715. The cubic root of 4197768557 is about 1613.1428593698.

The spelling of 4197768557 in words is "four billion, one hundred ninety-seven million, seven hundred sixty-eight thousand, five hundred fifty-seven".