216646361454 has 8 divisors (see below), whose sum is σ = 433292722920. Its totient is φ = 72215453816.

The previous prime is 216646361453. The next prime is 216646361471. The reversal of 216646361454 is 454163646612.

It is a sphenic number, since it is the product of 3 distinct primes.

216646361454 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216646361453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18053863449 + ... + 18053863460.

It is an arithmetic number, because the mean of its divisors is an integer number (54161590365).

Almost surely, 2^216646361454 is an apocalyptic number.

216646361454 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216646361454 is a wasteful number, since it uses less digits than its factorization.

216646361454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36107726914.

The product of its digits is 2488320, while the sum is 48.

The spelling of 216646361454 in words is "two hundred sixteen billion, six hundred forty-six million, three hundred sixty-one thousand, four hundred fifty-four".