218306253152634 has 32 divisors (see below), whose sum is σ = 442852157200320. Its totient is φ = 71733749577600.

The previous prime is 218306253152599. The next prime is 218306253152657. The reversal of 218306253152634 is 436251352603812.

218306253152634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×218306253152634² (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, 617365857 + ... + 617719364.

It is an arithmetic number, because the mean of its divisors is an integer number (13839129912510).

Almost surely, 2^{218306253152634} is an apocalyptic number.

218306253152634 is an abundant number, since it is smaller than the sum of its proper divisors (224545904047686).

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

218306253152634 is a wasteful number, since it uses less digits than its factorization.

218306253152634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235085646.

The product of its (nonzero) digits is 6220800, while the sum is 51.

The spelling of 218306253152634 in words is "two hundred eighteen trillion, three hundred six billion, two hundred fifty-three million, one hundred fifty-two thousand, six hundred thirty-four".