216560540046081 has 64 divisors (see below), whose sum is σ = 373537997199360. Its totient is φ = 108330030581760.

The previous prime is 216560540046079. The next prime is 216560540046083. The reversal of 216560540046081 is 180640045065612.

It is an interprime number because it is at equal distance from previous prime (216560540046079) and next prime (216560540046083).

It is not a de Polignac number, because 216560540046081 - 2¹ = 216560540046079 is a prime.

It is a super-2 number, since 2×216560540046081² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216560540046081.

It is not an unprimeable number, because it can be changed into a prime (216560540046083) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 129777171 + ... + 131435288.

It is an arithmetic number, because the mean of its divisors is an integer number (5836531206240).

Almost surely, 2^{216560540046081} is an apocalyptic number.

216560540046081 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

216560540046081 is a deficient number, since it is larger than the sum of its proper divisors (156977457153279).

216560540046081 is a wasteful number, since it uses less digits than its factorization.

216560540046081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261212614.

The product of its (nonzero) digits is 1382400, while the sum is 48.

The spelling of 216560540046081 in words is "two hundred sixteen trillion, five hundred sixty billion, five hundred forty million, forty-six thousand, eighty-one".