990272641689 has 20 divisors (see below), whose sum is σ = 1497119024016. Its totient is φ = 652227759576.

The previous prime is 990272641667. The next prime is 990272641691. The reversal of 990272641689 is 986146272099.

990272641689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 990272641689 - 2⁹ = 990272641177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990272646689) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 73641399 + ... + 73654844.

Almost surely, 2^990272641689 is an apocalyptic number.

It is an amenable number.

990272641689 is a deficient number, since it is larger than the sum of its proper divisors (506846382327).

990272641689 is a wasteful number, since it uses less digits than its factorization.

990272641689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147296338 (or 147296329 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 63.

The spelling of 990272641689 in words is "nine hundred ninety billion, two hundred seventy-two million, six hundred forty-one thousand, six hundred eighty-nine".