218274981506 has 16 divisors (see below), whose sum is σ = 328452938880. Its totient is φ = 108790938000.

The previous prime is 218274981487. The next prime is 218274981511. The reversal of 218274981506 is 605189472812.

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, 1586180 + ... + 1718288.

It is an arithmetic number, because the mean of its divisors is an integer number (20528308680).

Almost surely, 2^218274981506 is an apocalyptic number.

218274981506 is a deficient number, since it is larger than the sum of its proper divisors (110177957374).

218274981506 is a wasteful number, since it uses less digits than its factorization.

218274981506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134729.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 218274981506 in words is "two hundred eighteen billion, two hundred seventy-four million, nine hundred eighty-one thousand, five hundred six".