999999911582 has 16 divisors (see below), whose sum is σ = 1714781533920. Its totient is φ = 428447397888.

The previous prime is 999999911579. The next prime is 999999911611. The reversal of 999999911582 is 285119999999.

It is a junction number, because it is equal to n+sod(n) for n = 999999911497 and 999999911506.

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, 10282607 + ... + 10379402.

It is an arithmetic number, because the mean of its divisors is an integer number (107173845870).

Almost surely, 2^999999911582 is an apocalyptic number.

999999911582 is a deficient number, since it is larger than the sum of its proper divisors (714781622338).

999999911582 is a wasteful number, since it uses less digits than its factorization.

999999911582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20665475.

The product of its digits is 382637520, while the sum is 80.

The spelling of 999999911582 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred eleven thousand, five hundred eighty-two".