999161536 has 28 divisors (see below), whose sum is σ = 2099343528. Its totient is φ = 470193152.

The previous prime is 999161533. The next prime is 999161557. The reversal of 999161536 is 635161999.

It is a self number, because there is not a number n which added to its sum of digits gives 999161536.

It is not an unprimeable number, because it can be changed into a prime (999161533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458086 + ... + 460261.

Almost surely, 2^999161536 is an apocalyptic number.

It is an amenable number.

999161536 is an abundant number, since it is smaller than the sum of its proper divisors (1100181992).

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

999161536 is a wasteful number, since it uses less digits than its factorization.

999161536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918376 (or 918366 counting only the distinct ones).

The product of its digits is 393660, while the sum is 49.

The square root of 999161536 is about 31609.5165416999. The cubic root of 999161536 is about 999.7204338501.

The spelling of 999161536 in words is "nine hundred ninety-nine million, one hundred sixty-one thousand, five hundred thirty-six".