999868004658 has 24 divisors (see below), whose sum is σ = 2166422595948. Its totient is φ = 333282885792.

The previous prime is 999868004657. The next prime is 999868004731. The reversal of 999868004658 is 856400868999.

999868004658 is a `hidden beast` number, since 9 + 9 + 9 + 86 + 80 + 0 + 465 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 734666694129 + 265201310529 = 857127^2 + 514977^2 .

It is not an unprimeable number, because it can be changed into a prime (999868004657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 469660 + ... + 1490072.

Almost surely, 2^999868004658 is an apocalyptic number.

999868004658 is an abundant number, since it is smaller than the sum of its proper divisors (1166554591290).

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

999868004658 is a wasteful number, since it uses less digits than its factorization.

999868004658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074858 (or 1074855 counting only the distinct ones).

The product of its (nonzero) digits is 268738560, while the sum is 72.

The spelling of 999868004658 in words is "nine hundred ninety-nine billion, eight hundred sixty-eight million, four thousand, six hundred fifty-eight".