206147265532457 has 2 divisors, whose sum is σ = 206147265532458. Its totient is φ = 206147265532456.

The previous prime is 206147265532391. The next prime is 206147265532511. The reversal of 206147265532457 is 754235562741602.

206147265532457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161967900208921 + 44179365323536 = 12726661^2 + 6646756^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206147265532457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206147265532396 and 206147265532405.

It is not a weakly prime, because it can be changed into another prime (206147265532057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103073632766228 + 103073632766229.

It is an arithmetic number, because the mean of its divisors is an integer number (103073632766229).

Almost surely, 2^{206147265532457} is an apocalyptic number.

It is an amenable number.

206147265532457 is a deficient number, since it is larger than the sum of its proper divisors (1).

206147265532457 is an equidigital number, since it uses as much as digits as its factorization.

206147265532457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672000, while the sum is 59.

The spelling of 206147265532457 in words is "two hundred six trillion, one hundred forty-seven billion, two hundred sixty-five million, five hundred thirty-two thousand, four hundred fifty-seven".