216161142555 has 16 divisors (see below), whose sum is σ = 347172883200. Its totient is φ = 114847591008.

The previous prime is 216161142497. The next prime is 216161142557. The reversal of 216161142555 is 555241161612.

It is not a de Polignac number, because 216161142555 - 2²⁰ = 216160093979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216161142557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27392905 + ... + 27400794.

It is an arithmetic number, because the mean of its divisors is an integer number (21698305200).

Almost surely, 2^216161142555 is an apocalyptic number.

216161142555 is a deficient number, since it is larger than the sum of its proper divisors (131011740645).

216161142555 is a wasteful number, since it uses less digits than its factorization.

216161142555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54793970.

The product of its digits is 72000, while the sum is 39.

The spelling of 216161142555 in words is "two hundred sixteen billion, one hundred sixty-one million, one hundred forty-two thousand, five hundred fifty-five".