218390147604 has 36 divisors (see below), whose sum is σ = 552895053984. Its totient is φ = 72684193872.

The previous prime is 218390147579. The next prime is 218390147623. The reversal of 218390147604 is 406741093812.

218390147604 is a `hidden beast` number, since 2 + 1 + 8 + 39 + 0 + 1 + 4 + 7 + 604 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 218390147604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4664802 + ... + 4711385.

It is an arithmetic number, because the mean of its divisors is an integer number (15358195944).

Almost surely, 2^218390147604 is an apocalyptic number.

It is an amenable number.

218390147604 is an abundant number, since it is smaller than the sum of its proper divisors (334504906380).

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

218390147604 is a wasteful number, since it uses less digits than its factorization.

218390147604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9376844 (or 9376839 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 218390147604 in words is "two hundred eighteen billion, three hundred ninety million, one hundred forty-seven thousand, six hundred four".