216078460664 has 64 divisors (see below), whose sum is σ = 453082170240. Its totient is φ = 95772792960.

The previous prime is 216078460651. The next prime is 216078460727. The reversal of 216078460664 is 466064870612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 618119 + ... + 902345.

It is an arithmetic number, because the mean of its divisors is an integer number (7079408910).

Almost surely, 2^216078460664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216078460664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226541085120).

216078460664 is an abundant number, since it is smaller than the sum of its proper divisors (237003709576).

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

216078460664 is a wasteful number, since it uses less digits than its factorization.

216078460664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284460 (or 284456 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 50.

The spelling of 216078460664 in words is "two hundred sixteen billion, seventy-eight million, four hundred sixty thousand, six hundred sixty-four".