216890689633954 has 16 divisors (see below), whose sum is σ = 371817073286208. Its totient is φ = 92952037078992.

The previous prime is 216890689633951. The next prime is 216890689633963. The reversal of 216890689633954 is 459336986098612.

It is a super-2 number, since 2×216890689633954² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216890689633951) 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, 91759764 + ... + 94093759.

It is an arithmetic number, because the mean of its divisors is an integer number (23238567080388).

Almost surely, 2^{216890689633954} is an apocalyptic number.

216890689633954 is a deficient number, since it is larger than the sum of its proper divisors (154926383652254).

216890689633954 is a wasteful number, since it uses less digits than its factorization.

216890689633954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185936889.

The product of its (nonzero) digits is 3627970560, while the sum is 79.

The spelling of 216890689633954 in words is "two hundred sixteen trillion, eight hundred ninety billion, six hundred eighty-nine million, six hundred thirty-three thousand, nine hundred fifty-four".