216663796154 has 16 divisors (see below), whose sum is σ = 350107636200. Its totient is φ = 99966597120.

The previous prime is 216663796123. The next prime is 216663796159. The reversal of 216663796154 is 451697366612.

216663796154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 82251372025 + 134412424129 = 286795^2 + 366623^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 216663796154.

It is not an unprimeable number, because it can be changed into a prime (216663796159) 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 7 ways as a sum of consecutive naturals, for example, 1253879 + ... + 1416170.

Almost surely, 2^216663796154 is an apocalyptic number.

216663796154 is a deficient number, since it is larger than the sum of its proper divisors (133443840046).

216663796154 is a wasteful number, since it uses less digits than its factorization.

216663796154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673185.

The product of its digits is 9797760, while the sum is 56.

The spelling of 216663796154 in words is "two hundred sixteen billion, six hundred sixty-three million, seven hundred ninety-six thousand, one hundred fifty-four".