999216260416 has 56 divisors (see below), whose sum is σ = 2165431239360. Its totient is φ = 453694694400.

The previous prime is 999216260381. The next prime is 999216260431. The reversal of 999216260416 is 614062612999.

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, 125245 + ... + 1419196.

Almost surely, 2^999216260416 is an apocalyptic number.

It is an amenable number.

999216260416 is an abundant number, since it is smaller than the sum of its proper divisors (1166214978944).

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

999216260416 is a wasteful number, since it uses less digits than its factorization.

999216260416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545383 (or 1545373 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 55.

The spelling of 999216260416 in words is "nine hundred ninety-nine billion, two hundred sixteen million, two hundred sixty thousand, four hundred sixteen".