980618828644 has 81 divisors (see below), whose sum is σ = 2162027747691. Its totient is φ = 387865820160.

The previous prime is 980618828633. The next prime is 980618828711. The reversal of 980618828644 is 446828816089.

It is a happy number.

The square root of 980618828644 is 990262.

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

It can be written as a sum of positive squares in 4 ways, for example, as 23180062500 + 957438766144 = 152250^2 + 978488^2 .

It is a super-2 number, since 2×980618828644² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 180224964 + ... + 180230404.

Almost surely, 2^980618828644 is an apocalyptic number.

980618828644 is the 990262-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 980618828644

980618828644 is an abundant number, since it is smaller than the sum of its proper divisors (1181408919047).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

980618828644 is an equidigital number, since it uses as much as digits as its factorization.

980618828644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10926 (or 5463 counting only the distinct ones).

The product of its (nonzero) digits is 42467328, while the sum is 64.

Multiplying 980618828644 by its sum of digits (64), we get a square (62759605033216 = 7922096²).

The spelling of 980618828644 in words is "nine hundred eighty billion, six hundred eighteen million, eight hundred twenty-eight thousand, six hundred forty-four".