990659355243 has 8 divisors (see below), whose sum is σ = 1329292383888. Its totient is φ = 656232948384.

The previous prime is 990659355221. The next prime is 990659355247. The reversal of 990659355243 is 342553956099.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 990659355243 - 2²⁵ = 990625800811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990659355247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1051654896 + ... + 1051655837.

It is an arithmetic number, because the mean of its divisors is an integer number (166161547986).

Almost surely, 2^990659355243 is an apocalyptic number.

990659355243 is a deficient number, since it is larger than the sum of its proper divisors (338633028645).

990659355243 is a wasteful number, since it uses less digits than its factorization.

990659355243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2103310893.

The product of its (nonzero) digits is 39366000, while the sum is 60.

The spelling of 990659355243 in words is "nine hundred ninety billion, six hundred fifty-nine million, three hundred fifty-five thousand, two hundred forty-three".