990440242201 has 8 divisors (see below), whose sum is σ = 991464961608. Its totient is φ = 989415840000.

The previous prime is 990440242193. The next prime is 990440242237. The reversal of 990440242201 is 102242044099.

It can be written as a sum of positive squares in 4 ways, for example, as 48276878400 + 942163363801 = 219720^2 + 970651^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 990440242201 - 2³ = 990440242193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990440242901) 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, 6444351 + ... + 6596251.

It is an arithmetic number, because the mean of its divisors is an integer number (123933120201).

Almost surely, 2^990440242201 is an apocalyptic number.

It is an amenable number.

990440242201 is a deficient number, since it is larger than the sum of its proper divisors (1024719407).

990440242201 is a wasteful number, since it uses less digits than its factorization.

990440242201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158603.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 990440242201 in words is "nine hundred ninety billion, four hundred forty million, two hundred forty-two thousand, two hundred one".