218039413542 has 32 divisors (see below), whose sum is σ = 441538173792. Its totient is φ = 71775412224.

The previous prime is 218039413531. The next prime is 218039413567. The reversal of 218039413542 is 245314930812.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 218039413494 and 218039413503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 528543 + ... + 845834.

It is an arithmetic number, because the mean of its divisors is an integer number (13798067931).

Almost surely, 2^218039413542 is an apocalyptic number.

218039413542 is an abundant number, since it is smaller than the sum of its proper divisors (223498760250).

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

218039413542 is a wasteful number, since it uses less digits than its factorization.

218039413542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374712.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 218039413542 in words is "two hundred eighteen billion, thirty-nine million, four hundred thirteen thousand, five hundred forty-two".