216346554960 has 40 divisors (see below), whose sum is σ = 670674321120. Its totient is φ = 57692414592.

The previous prime is 216346554959. The next prime is 216346554961. The reversal of 216346554960 is 69455643612.

It is an interprime number because it is at equal distance from previous prime (216346554959) and next prime (216346554961).

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216346554961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450721750 + ... + 450722229.

It is an arithmetic number, because the mean of its divisors is an integer number (16766858028).

Almost surely, 2^216346554960 is an apocalyptic number.

216346554960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216346554960 is an abundant number, since it is smaller than the sum of its proper divisors (454327766160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216346554960 is a wasteful number, since it uses less digits than its factorization.

216346554960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901443995 (or 901443989 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 51.

The spelling of 216346554960 in words is "two hundred sixteen billion, three hundred forty-six million, five hundred fifty-four thousand, nine hundred sixty".