990722369522 has 6 divisors (see below), whose sum is σ = 1486085665743. Its totient is φ = 495360480942.

The previous prime is 990722369501. The next prime is 990722369543. The reversal of 990722369522 is 225963227099.

It is an interprime number because it is at equal distance from previous prime (990722369501) and next prime (990722369543).

It can be written as a sum of positive squares in only one way, i.e., 495361184761 + 495361184761 = 703819^2 + 703819^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=703819.

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, 1055729 + ... + 1759547.

Almost surely, 2^990722369522 is an apocalyptic number.

990722369522 is a deficient number, since it is larger than the sum of its proper divisors (495363296221).

990722369522 is an frugal number, since it uses more digits than its factorization.

990722369522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407640 (or 703821 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 56.

The spelling of 990722369522 in words is "nine hundred ninety billion, seven hundred twenty-two million, three hundred sixty-nine thousand, five hundred twenty-two".