999932001156 has 243 divisors, whose sum is σ = 2824317967653. Its totient is φ = 298069865280.

The previous prime is 999932001151. The next prime is 999932001253. The reversal of 999932001156 is 651100239999.

The square root of 999932001156 is 999966.

It is a perfect power (a square), and thus also a powerful number.

999932001156 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 696947807556 + 302984193600 = 834834^2 + 550440^2 .

It is not an unprimeable number, because it can be changed into a prime (999932001151) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 7193755335 + ... + 7193755473.

Almost surely, 2^999932001156 is an apocalyptic number.

999932001156 is the 999966-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999932001156

999932001156 is an abundant number, since it is smaller than the sum of its proper divisors (1824385966497).

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

999932001156 is a wasteful number, since it uses less digits than its factorization.

999932001156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 1180980, while the sum is 54.

The spelling of 999932001156 in words is "nine hundred ninety-nine billion, nine hundred thirty-two million, one thousand, one hundred fifty-six".