216603433990 has 16 divisors (see below), whose sum is σ = 412820662752. Its totient is φ = 81544822144.

The previous prime is 216603433979. The next prime is 216603434027. The reversal of 216603433990 is 99334306612.

It is a self number, because there is not a number n which added to its sum of digits gives 216603433990.

It is a congruent number.

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, 637068754 + ... + 637069093.

It is an arithmetic number, because the mean of its divisors is an integer number (25801291422).

Almost surely, 2^216603433990 is an apocalyptic number.

216603433990 is a deficient number, since it is larger than the sum of its proper divisors (196217228762).

216603433990 is a wasteful number, since it uses less digits than its factorization.

216603433990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274137871.

The product of its (nonzero) digits is 629856, while the sum is 46.

The spelling of 216603433990 in words is "two hundred sixteen billion, six hundred three million, four hundred thirty-three thousand, nine hundred ninety".