216400327449 has 16 divisors (see below), whose sum is σ = 289718231040. Its totient is φ = 143674794000.

The previous prime is 216400327441. The next prime is 216400327477. The reversal of 216400327449 is 944723004612.

It is not a de Polignac number, because 216400327449 - 2³ = 216400327441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216400327449.

It is not an unprimeable number, because it can be changed into a prime (216400327441) 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, 10350084 + ... + 10370970.

It is an arithmetic number, because the mean of its divisors is an integer number (18107389440).

Almost surely, 2^216400327449 is an apocalyptic number.

It is an amenable number.

216400327449 is a deficient number, since it is larger than the sum of its proper divisors (73317903591).

216400327449 is a wasteful number, since it uses less digits than its factorization.

216400327449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34900.

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 216400327449 in words is "two hundred sixteen billion, four hundred million, three hundred twenty-seven thousand, four hundred forty-nine".