999546000778 has 16 divisors (see below), whose sum is σ = 1614670645896. Its totient is φ = 461323376640.

The previous prime is 999546000751. The next prime is 999546000787. The reversal of 999546000778 is 877000645999.

999546000778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

999546000778 is a nontrivial binomial coefficient, being equal to C(1413893, 2).

It can be written as a sum of positive squares in 4 ways, for example, as 591433288209 + 408112712569 = 769047^2 + 638837^2 .

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, 2651050 + ... + 3004522.

Almost surely, 2^999546000778 is an apocalyptic number.

999546000778 is the 1413892-nd triangular number.

999546000778 is the 471298-th centered nonagonal number.

999546000778 is a deficient number, since it is larger than the sum of its proper divisors (615124645118).

999546000778 is a wasteful number, since it uses less digits than its factorization.

999546000778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462249.

The product of its (nonzero) digits is 34292160, while the sum is 64.

The spelling of 999546000778 in words is "nine hundred ninety-nine billion, five hundred forty-six million, seven hundred seventy-eight", and thus it is an aban number.