1980870464356 has 81 divisors (see below), whose sum is σ = 4059419229369. Its totient is φ = 843311933856.

The previous prime is 1980870464341. The next prime is 1980870464381. The reversal of 1980870464356 is 6534640780891.

It is a happy number.

The square root of 1980870464356 is 1407434.

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., 1844886526756 + 135983937600 = 1358266^2 + 368760^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1980870464294 and 1980870464303.

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 4512233185 + ... + 4512233623.

Almost surely, 2^{1980870464356} is an apocalyptic number.

1980870464356 is the 1407434-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1980870464356

1980870464356 is an abundant number, since it is smaller than the sum of its proper divisors (2078548765013).

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

1980870464356 is an frugal number, since it uses more digits than its factorization.

1980870464356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 61.

The spelling of 1980870464356 in words is "one trillion, nine hundred eighty billion, eight hundred seventy million, four hundred sixty-four thousand, three hundred fifty-six".