218401880484 has 24 divisors (see below), whose sum is σ = 510181540960. Its totient is φ = 72718176384.

The previous prime is 218401880471. The next prime is 218401880503. The reversal of 218401880484 is 484088104812.

It is a happy number.

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, 10295269 + ... + 10316460.

Almost surely, 2^218401880484 is an apocalyptic number.

It is an amenable number.

218401880484 is an abundant number, since it is smaller than the sum of its proper divisors (291779660476).

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

218401880484 is a wasteful number, since it uses less digits than its factorization.

218401880484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20612619 (or 20612617 counting only the distinct ones).

The product of its (nonzero) digits is 524288, while the sum is 48.

The spelling of 218401880484 in words is "two hundred eighteen billion, four hundred one million, eight hundred eighty thousand, four hundred eighty-four".