216411761804 has 24 divisors (see below), whose sum is σ = 433902906528. Its totient is φ = 92516601600.

The previous prime is 216411761803. The next prime is 216411761807. The reversal of 216411761804 is 408167114612.

It is a super-2 number, since 2×216411761804² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216411761801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9625919 + ... + 9648374.

It is an arithmetic number, because the mean of its divisors is an integer number (18079287772).

Almost surely, 2^216411761804 is an apocalyptic number.

It is an amenable number.

216411761804 is an abundant number, since it is smaller than the sum of its proper divisors (217491144724).

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

216411761804 is a wasteful number, since it uses less digits than its factorization.

216411761804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19274705 (or 19274703 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The spelling of 216411761804 in words is "two hundred sixteen billion, four hundred eleven million, seven hundred sixty-one thousand, eight hundred four".