216918890954 has 8 divisors (see below), whose sum is σ = 344518238628. Its totient is φ = 102079478080.

The previous prime is 216918890941. The next prime is 216918890957. The reversal of 216918890954 is 459098819612.

216918890954 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 191087008225 + 25831882729 = 437135^2 + 160723^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (216918890957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3189983657 + ... + 3189983724.

Almost surely, 2^216918890954 is an apocalyptic number.

216918890954 is a deficient number, since it is larger than the sum of its proper divisors (127599347674).

216918890954 is a wasteful number, since it uses less digits than its factorization.

216918890954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6379967400.

The product of its (nonzero) digits is 11197440, while the sum is 62.

The spelling of 216918890954 in words is "two hundred sixteen billion, nine hundred eighteen million, eight hundred ninety thousand, nine hundred fifty-four".