216400542416 has 40 divisors (see below), whose sum is σ = 425094891144. Its totient is φ = 106699161600.

The previous prime is 216400542383. The next prime is 216400542437. The reversal of 216400542416 is 614245004612.

It can be written as a sum of positive squares in 4 ways, for example, as 131766096016 + 84634446400 = 362996^2 + 290920^2 .

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, 8440016 + ... + 8465616.

Almost surely, 2^216400542416 is an apocalyptic number.

It is an amenable number.

216400542416 is a deficient number, since it is larger than the sum of its proper divisors (208694348728).

216400542416 is a wasteful number, since it uses less digits than its factorization.

216400542416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32919 (or 32913 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 216400542416 in words is "two hundred sixteen billion, four hundred million, five hundred forty-two thousand, four hundred sixteen".