218040811902 has 32 divisors (see below), whose sum is σ = 484628781600. Its totient is φ = 72666224064.

The previous prime is 218040811871. The next prime is 218040811979. The reversal of 218040811902 is 209118040812.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106293 + ... + 668864.

It is an arithmetic number, because the mean of its divisors is an integer number (15144649425).

Almost surely, 2^218040811902 is an apocalyptic number.

218040811902 is an abundant number, since it is smaller than the sum of its proper divisors (266587969698).

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

218040811902 is a wasteful number, since it uses less digits than its factorization.

218040811902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780377 (or 780371 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The spelling of 218040811902 in words is "two hundred eighteen billion, forty million, eight hundred eleven thousand, nine hundred two".