208577486358413 has 2 divisors, whose sum is σ = 208577486358414. Its totient is φ = 208577486358412.

The previous prime is 208577486358401. The next prime is 208577486358431. The reversal of 208577486358413 is 314853684775802.

Together with next prime (208577486358431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189135189485449 + 19442296872964 = 13752643^2 + 4409342^2 .

It is a cyclic number.

It is not a de Polignac number, because 208577486358413 - 2⁶ = 208577486358349 is a prime.

It is a super-2 number, since 2×208577486358413² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208577486358013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104288743179206 + 104288743179207.

It is an arithmetic number, because the mean of its divisors is an integer number (104288743179207).

Almost surely, 2^{208577486358413} is an apocalyptic number.

It is an amenable number.

208577486358413 is a deficient number, since it is larger than the sum of its proper divisors (1).

208577486358413 is an equidigital number, since it uses as much as digits as its factorization.

208577486358413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1083801600, while the sum is 71.

The spelling of 208577486358413 in words is "two hundred eight trillion, five hundred seventy-seven billion, four hundred eighty-six million, three hundred fifty-eight thousand, four hundred thirteen".