216138494608 has 40 divisors (see below), whose sum is σ = 424770804000. Its totient is φ = 106522078464.

The previous prime is 216138494603. The next prime is 216138494629. The reversal of 216138494608 is 806494831612.

It is not an unprimeable number, because it can be changed into a prime (216138494603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1833843 + ... + 1948141.

It is an arithmetic number, because the mean of its divisors is an integer number (10619270100).

Almost surely, 2^216138494608 is an apocalyptic number.

It is an amenable number.

216138494608 is a deficient number, since it is larger than the sum of its proper divisors (208632309392).

216138494608 is a wasteful number, since it uses less digits than its factorization.

216138494608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115999 (or 115993 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 52.

The spelling of 216138494608 in words is "two hundred sixteen billion, one hundred thirty-eight million, four hundred ninety-four thousand, six hundred eight".