218190796680 has 32 divisors (see below), whose sum is σ = 654572390400. Its totient is φ = 58184212416.

The previous prime is 218190796669. The next prime is 218190796697. The reversal of 218190796680 is 86697091812.

It is a self number, because there is not a number n which added to its sum of digits gives 218190796680.

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, 909128200 + ... + 909128439.

It is an arithmetic number, because the mean of its divisors is an integer number (20455387200).

Almost surely, 2^218190796680 is an apocalyptic number.

218190796680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218190796680 is an abundant number, since it is smaller than the sum of its proper divisors (436381593720).

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

218190796680 is a wasteful number, since it uses less digits than its factorization.

218190796680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818256653 (or 1818256649 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 57.

The spelling of 218190796680 in words is "two hundred eighteen billion, one hundred ninety million, seven hundred ninety-six thousand, six hundred eighty".