9990802116 has 81 divisors (see below), whose sum is σ = 26267095309. Its totient is φ = 3324869856.

The previous prime is 9990802061. The next prime is 9990802163. The reversal of 9990802116 is 6112080999.

The square root of 9990802116 is 99954.

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

It can be written as a sum of positive squares in only one way, i.e., 289340100 + 9701462016 = 17010^2 + 98496^2 .

It is a tau number, because it is divible by the number of its divisors (81).

It is a super-2 number, since 2×9990802116² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 16192240 + ... + 16192856.

Almost surely, 2^9990802116 is an apocalyptic number.

9990802116 is the 99954-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9990802116

9990802116 is an abundant number, since it is smaller than the sum of its proper divisors (16276293193).

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

9990802116 is an frugal number, since it uses more digits than its factorization.

9990802116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262 (or 622 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The cubic root of 9990802116 is about 2153.7739460634.

The spelling of 9990802116 in words is "nine billion, nine hundred ninety million, eight hundred two thousand, one hundred sixteen".