218840935493764 has 48 divisors (see below), whose sum is σ = 407073974272000. Its totient is φ = 102651764292000.

The previous prime is 218840935493759. The next prime is 218840935493773. The reversal of 218840935493764 is 467394539048812.

It is a super-2 number, since 2×218840935493764² (a number of 29 digits) contains 22 as substring.

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, 31097412 + ... + 37479739.

It is a 2-persistent number, because it is pandigital, and so is 2⋅218840935493764 = 437681870987528, but 3⋅218840935493764 = 656522806481292 is not.

Almost surely, 2^{218840935493764} is an apocalyptic number.

It is an amenable number.

218840935493764 is a deficient number, since it is larger than the sum of its proper divisors (188233038778236).

218840935493764 is a wasteful number, since it uses less digits than its factorization.

218840935493764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68577584 (or 68577582 counting only the distinct ones).

The product of its (nonzero) digits is 1254113280, while the sum is 73.

The spelling of 218840935493764 in words is "two hundred eighteen trillion, eight hundred forty billion, nine hundred thirty-five million, four hundred ninety-three thousand, seven hundred sixty-four".