208116626257 has 4 divisors (see below), whose sum is σ = 208987407360. Its totient is φ = 207245845156.

The previous prime is 208116626243. The next prime is 208116626273. The reversal of 208116626257 is 752626611802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 208116626257 - 2⁷ = 208116626129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208116626227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435390193 + ... + 435390670.

It is an arithmetic number, because the mean of its divisors is an integer number (52246851840).

Almost surely, 2^208116626257 is an apocalyptic number.

It is an amenable number.

208116626257 is a deficient number, since it is larger than the sum of its proper divisors (870781103).

208116626257 is an equidigital number, since it uses as much as digits as its factorization.

208116626257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870781102.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 208116626257 in words is "two hundred eight billion, one hundred sixteen million, six hundred twenty-six thousand, two hundred fifty-seven".