216542638851034 has 16 divisors (see below), whose sum is σ = 326966476011840. Its totient is φ = 107553819794400.

The previous prime is 216542638851013. The next prime is 216542638851083. The reversal of 216542638851034 is 430158836245612.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 216542638851034.

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, 73423597 + ... + 76315855.

It is an arithmetic number, because the mean of its divisors is an integer number (20435404750740).

Almost surely, 2^{216542638851034} is an apocalyptic number.

216542638851034 is a deficient number, since it is larger than the sum of its proper divisors (110423837160806).

216542638851034 is a wasteful number, since it uses less digits than its factorization.

216542638851034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140325.

The product of its (nonzero) digits is 33177600, while the sum is 58.

The spelling of 216542638851034 in words is "two hundred sixteen trillion, five hundred forty-two billion, six hundred thirty-eight million, eight hundred fifty-one thousand, thirty-four".