216369028955 has 16 divisors (see below), whose sum is σ = 271686389760. Its totient is φ = 165108116448.

The previous prime is 216369028937. The next prime is 216369028957. The reversal of 216369028955 is 559820963612.

It is a cyclic number.

It is not a de Polignac number, because 216369028955 - 2¹⁴ = 216369012571 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216369028955.

It is not an unprimeable number, because it can be changed into a prime (216369028957) 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, 2579147 + ... + 2661716.

It is an arithmetic number, because the mean of its divisors is an integer number (16980399360).

Almost surely, 2^216369028955 is an apocalyptic number.

216369028955 is a deficient number, since it is larger than the sum of its proper divisors (55317360805).

216369028955 is a wasteful number, since it uses less digits than its factorization.

216369028955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5241250.

The product of its (nonzero) digits is 6998400, while the sum is 56.

The spelling of 216369028955 in words is "two hundred sixteen billion, three hundred sixty-nine million, twenty-eight thousand, nine hundred fifty-five".