216440055503 has 16 divisors (see below), whose sum is σ = 251779968000. Its totient is φ = 182210803872.

The previous prime is 216440055487. The next prime is 216440055521. The reversal of 216440055503 is 305550044612.

It is a cyclic number.

It is not a de Polignac number, because 216440055503 - 2⁴ = 216440055487 is a prime.

It is a super-2 number, since 2×216440055503² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216440055523) 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, 221738 + ... + 694296.

It is an arithmetic number, because the mean of its divisors is an integer number (15736248000).

Almost surely, 2^216440055503 is an apocalyptic number.

216440055503 is a deficient number, since it is larger than the sum of its proper divisors (35339912497).

216440055503 is a wasteful number, since it uses less digits than its factorization.

216440055503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473734.

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 216440055503 in words is "two hundred sixteen billion, four hundred forty million, fifty-five thousand, five hundred three".