216240899578 has 16 divisors (see below), whose sum is σ = 354758395680. Its totient is φ = 98038637200.

The previous prime is 216240899551. The next prime is 216240899579. The reversal of 216240899578 is 875998042612.

It is a super-4 number, since 4×216240899578⁴ (a number of 46 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (216240899579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12625288 + ... + 12642403.

It is an arithmetic number, because the mean of its divisors is an integer number (22172399730).

Almost surely, 2^216240899578 is an apocalyptic number.

216240899578 is a deficient number, since it is larger than the sum of its proper divisors (138517496102).

216240899578 is a wasteful number, since it uses less digits than its factorization.

216240899578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25268093.

The product of its (nonzero) digits is 17418240, while the sum is 61.

The spelling of 216240899578 in words is "two hundred sixteen billion, two hundred forty million, eight hundred ninety-nine thousand, five hundred seventy-eight".