208681164680 has 32 divisors (see below), whose sum is σ = 469566855000. Its totient is φ = 83466379776.

The previous prime is 208681164673. The next prime is 208681164733. The reversal of 208681164680 is 86461186802.

It can be written as a sum of positive squares in 4 ways, for example, as 198682364644 + 9998800036 = 445738^2 + 99994^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386894 + ... + 753026.

Almost surely, 2^208681164680 is an apocalyptic number.

208681164680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208681164680 is an abundant number, since it is smaller than the sum of its proper divisors (260885690320).

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

208681164680 is a wasteful number, since it uses less digits than its factorization.

208681164680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380393 (or 380389 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 50.

The spelling of 208681164680 in words is "two hundred eight billion, six hundred eighty-one million, one hundred sixty-four thousand, six hundred eighty".