999158269564 has 192 divisors, whose sum is σ = 2202111442944. Its totient is φ = 386195040000.

The previous prime is 999158269537. The next prime is 999158269567. The reversal of 999158269564 is 465962851999.

999158269564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999158269567) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2318232429 + ... + 2318232859.

It is an arithmetic number, because the mean of its divisors is an integer number (11469330432).

Almost surely, 2^999158269564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999158269564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1101055721472).

999158269564 is an abundant number, since it is smaller than the sum of its proper divisors (1202953173380).

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

999158269564 is a wasteful number, since it uses less digits than its factorization.

999158269564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128 (or 1126 counting only the distinct ones).

The product of its digits is 377913600, while the sum is 73.

The spelling of 999158269564 in words is "nine hundred ninety-nine billion, one hundred fifty-eight million, two hundred sixty-nine thousand, five hundred sixty-four".