216987604040 has 32 divisors (see below), whose sum is σ = 488240343360. Its totient is φ = 86791800000.

The previous prime is 216987604039. The next prime is 216987604069. The reversal of 216987604040 is 40406789612.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1184615 + ... + 1355465.

It is an arithmetic number, because the mean of its divisors is an integer number (15257510730).

Almost surely, 2^216987604040 is an apocalyptic number.

216987604040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216987604040 is an abundant number, since it is smaller than the sum of its proper divisors (271252739320).

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

216987604040 is a wasteful number, since it uses less digits than its factorization.

216987604040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202613 (or 202609 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 216987604040 in words is "two hundred sixteen billion, nine hundred eighty-seven million, six hundred four thousand, forty".