990418343042 has 6 divisors (see below), whose sum is σ = 1485629625699. Its totient is φ = 495208467810.

The previous prime is 990418343039. The next prime is 990418343059. The reversal of 990418343042 is 240343814099.

It can be written as a sum of positive squares in only one way, i.e., 495209171521 + 495209171521 = 703711^2 + 703711^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=703711.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1055567 + ... + 1759277.

Almost surely, 2^990418343042 is an apocalyptic number.

990418343042 is a deficient number, since it is larger than the sum of its proper divisors (495211282657).

990418343042 is an frugal number, since it uses more digits than its factorization.

990418343042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407424 (or 703713 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 47.

The spelling of 990418343042 in words is "nine hundred ninety billion, four hundred eighteen million, three hundred forty-three thousand, forty-two".