990610146436 has 27 divisors (see below), whose sum is σ = 1740306550437. Its totient is φ = 493387141680.

The previous prime is 990610146433. The next prime is 990610146467. The reversal of 990610146436 is 634641016099.

It is a happy number.

The square root of 990610146436 is 995294.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 761245780036 + 229364366400 = 872494^2 + 478920^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 990610146436.

It is not an unprimeable number, because it can be changed into a prime (990610146433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 611109706 + ... + 611111326.

Almost surely, 2^990610146436 is an apocalyptic number.

990610146436 is the 995294-th square number.

It is an amenable number.

990610146436 is a deficient number, since it is larger than the sum of its proper divisors (749696404001).

990610146436 is an frugal number, since it uses more digits than its factorization.

990610146436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3860 (or 1930 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 49.

Multiplying 990610146436 by its sum of digits (49), we get a square (48539897175364 = 6967058²).

The spelling of 990610146436 in words is "nine hundred ninety billion, six hundred ten million, one hundred forty-six thousand, four hundred thirty-six".