216799432690 has 32 divisors (see below), whose sum is σ = 390819349440. Its totient is φ = 86590891200.

The previous prime is 216799432643. The next prime is 216799432777. The reversal of 216799432690 is 96234997612.

It is a super-2 number, since 2×216799432690² (a number of 23 digits) contains 22 as substring.

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, 30884001 + ... + 30891019.

It is an arithmetic number, because the mean of its divisors is an integer number (12213104670).

Almost surely, 2^216799432690 is an apocalyptic number.

216799432690 is a deficient number, since it is larger than the sum of its proper divisors (174019916750).

216799432690 is a wasteful number, since it uses less digits than its factorization.

216799432690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11178.

The product of its (nonzero) digits is 8817984, while the sum is 58.

The spelling of 216799432690 in words is "two hundred sixteen billion, seven hundred ninety-nine million, four hundred thirty-two thousand, six hundred ninety".