990829123216 has 15 divisors (see below), whose sum is σ = 1919739140643. Its totient is φ = 495412570800.

The previous prime is 990829123171. The next prime is 990829123217. The reversal of 990829123216 is 612321928099.

The square root of 990829123216 is 995404.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990829123217) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3857191 + ... + 4106041.

Almost surely, 2^990829123216 is an apocalyptic number.

990829123216 is the 995404-th square number.

It is an amenable number.

990829123216 is a deficient number, since it is larger than the sum of its proper divisors (928910017427).

990829123216 is an frugal number, since it uses more digits than its factorization.

990829123216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497710 (or 248853 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 52.

The spelling of 990829123216 in words is "nine hundred ninety billion, eight hundred twenty-nine million, one hundred twenty-three thousand, two hundred sixteen".