999768013456 has 15 divisors (see below), whose sum is σ = 1937058275203. Its totient is φ = 499882006960.

The previous prime is 999768013427. The next prime is 999768013481. The reversal of 999768013456 is 654310867999.

The square root of 999768013456 is 999884.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 999768013391 and 999768013400.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3874551 + ... + 4124521.

Almost surely, 2^999768013456 is an apocalyptic number.

999768013456 is the 999884-th square number.

It is an amenable number.

999768013456 is a deficient number, since it is larger than the sum of its proper divisors (937290261747).

999768013456 is an frugal number, since it uses more digits than its factorization.

999768013456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499950 (or 249973 counting only the distinct ones).

The product of its (nonzero) digits is 88179840, while the sum is 67.

The spelling of 999768013456 in words is "nine hundred ninety-nine billion, seven hundred sixty-eight million, thirteen thousand, four hundred fifty-six".