206013272557 has 2 divisors, whose sum is σ = 206013272558. Its totient is φ = 206013272556.

The previous prime is 206013272551. The next prime is 206013272581. The reversal of 206013272557 is 755272310602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203749320996 + 2263951561 = 451386^2 + 47581^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206013272557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206013272551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103006636278 + 103006636279.

It is an arithmetic number, because the mean of its divisors is an integer number (103006636279).

Almost surely, 2^206013272557 is an apocalyptic number.

It is an amenable number.

206013272557 is a deficient number, since it is larger than the sum of its proper divisors (1).

206013272557 is an equidigital number, since it uses as much as digits as its factorization.

206013272557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176400, while the sum is 40.

The spelling of 206013272557 in words is "two hundred six billion, thirteen million, two hundred seventy-two thousand, five hundred fifty-seven".