208286786172 has 24 divisors (see below), whose sum is σ = 488984116096. Its totient is φ = 69002983728.

The previous prime is 208286786171. The next prime is 208286786273. The reversal of 208286786172 is 271687682802.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208286786171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53241088 + ... + 53244999.

Almost surely, 2^208286786172 is an apocalyptic number.

It is an amenable number.

208286786172 is an abundant number, since it is smaller than the sum of its proper divisors (280697329924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

208286786172 is a wasteful number, since it uses less digits than its factorization.

208286786172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106486257 (or 106486255 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 57.

The spelling of 208286786172 in words is "two hundred eight billion, two hundred eighty-six million, seven hundred eighty-six thousand, one hundred seventy-two".