84218361616 has 15 divisors (see below), whose sum is σ = 163175324743. Its totient is φ = 42108600400.

The previous prime is 84218361589. The next prime is 84218361637. The reversal of 84218361616 is 61616381248.

The square root of 84218361616 is 290204.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1124541 + ... + 1197091.

Almost surely, 2^84218361616 is an apocalyptic number.

84218361616 is the 290204-th square number.

It is an amenable number.

84218361616 is a deficient number, since it is larger than the sum of its proper divisors (78956963127).

84218361616 is an frugal number, since it uses more digits than its factorization.

84218361616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145110 (or 72553 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The spelling of 84218361616 in words is "eighty-four billion, two hundred eighteen million, three hundred sixty-one thousand, six hundred sixteen".