216440040505101 has 16 divisors (see below), whose sum is σ = 329888988455424. Its totient is φ = 123651675620784.

The previous prime is 216440040505063. The next prime is 216440040505127. The reversal of 216440040505101 is 101505040044612.

It is not a de Polignac number, because 216440040505101 - 2²⁵ = 216440006950669 is a prime.

It is a super-2 number, since 2×216440040505101² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216440040505201) 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, 1181053071 + ... + 1181236316.

It is an arithmetic number, because the mean of its divisors is an integer number (20618061778464).

Almost surely, 2^{216440040505101} is an apocalyptic number.

216440040505101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

216440040505101 is a deficient number, since it is larger than the sum of its proper divisors (113448947950323).

216440040505101 is a wasteful number, since it uses less digits than its factorization.

216440040505101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362293760.

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 216440040505101 its reverse (101505040044612), we get a palindrome (317945080549713).

The spelling of 216440040505101 in words is "two hundred sixteen trillion, four hundred forty billion, forty million, five hundred five thousand, one hundred one".