218430137764 has 24 divisors (see below), whose sum is σ = 400850787960. Its totient is φ = 104004520704.

The previous prime is 218430137711. The next prime is 218430137767. The reversal of 218430137764 is 467731034812.

It can be written as a sum of positive squares in 4 ways, for example, as 29857075264 + 188573062500 = 172792^2 + 434250^2 .

It is not an unprimeable number, because it can be changed into a prime (218430137767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12888919 + ... + 12905854.

It is an arithmetic number, because the mean of its divisors is an integer number (16702116165).

Almost surely, 2^218430137764 is an apocalyptic number.

It is an amenable number.

218430137764 is a deficient number, since it is larger than the sum of its proper divisors (182420650196).

218430137764 is a wasteful number, since it uses less digits than its factorization.

218430137764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25794879 (or 25794877 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 218430137764 in words is "two hundred eighteen billion, four hundred thirty million, one hundred thirty-seven thousand, seven hundred sixty-four".