208112741661 has 16 divisors (see below), whose sum is σ = 303325982208. Its totient is φ = 125872042800.

The previous prime is 208112741651. The next prime is 208112741663. The reversal of 208112741661 is 166147211802.

It is not a de Polignac number, because 208112741661 - 2¹⁰ = 208112740637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208112741663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6405841 + ... + 6438246.

It is an arithmetic number, because the mean of its divisors is an integer number (18957873888).

Almost surely, 2^208112741661 is an apocalyptic number.

It is an amenable number.

208112741661 is a deficient number, since it is larger than the sum of its proper divisors (95213240547).

208112741661 is a wasteful number, since it uses less digits than its factorization.

208112741661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12844592.

The product of its (nonzero) digits is 32256, while the sum is 39.

The spelling of 208112741661 in words is "two hundred eight billion, one hundred twelve million, seven hundred forty-one thousand, six hundred sixty-one".