216694669064 has 64 divisors (see below), whose sum is σ = 419502792960. Its totient is φ = 104886397440.

The previous prime is 216694668991. The next prime is 216694669069. The reversal of 216694669064 is 460966496612.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 216694668994 and 216694669012.

It is not an unprimeable number, because it can be changed into a prime (216694669069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48616724 + ... + 48621180.

It is an arithmetic number, because the mean of its divisors is an integer number (6554731140).

Almost surely, 2^216694669064 is an apocalyptic number.

It is an amenable number.

216694669064 is a deficient number, since it is larger than the sum of its proper divisors (202808123896).

216694669064 is a wasteful number, since it uses less digits than its factorization.

216694669064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6078 (or 6074 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 59.

The spelling of 216694669064 in words is "two hundred sixteen billion, six hundred ninety-four million, six hundred sixty-nine thousand, sixty-four".