1997773057476 has 243 divisors, whose sum is σ = 5968925461863. Its totient is φ = 561752029440.

The previous prime is 1997773057471. The next prime is 1997773057477. The reversal of 1997773057476 is 6747503777991.

The square root of 1997773057476 is 1413426.

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

1997773057476 is a `hidden beast` number, since 1 + 9 + 9 + 7 + 77 + 30 + 57 + 476 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 26624448900 + 1971148608576 = 163170^2 + 1403976^2 .

It is not an unprimeable number, because it can be changed into a prime (1997773057471) 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 80 ways as a sum of consecutive naturals, for example, 4333563886 + ... + 4333564346.

Almost surely, 2^{1997773057476} is an apocalyptic number.

1997773057476 is the 1413426-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1997773057476

1997773057476 is an abundant number, since it is smaller than the sum of its proper divisors (3971152404387).

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

1997773057476 is an equidigital number, since it uses as much as digits as its factorization.

1997773057476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 490092120, while the sum is 72.

The spelling of 1997773057476 in words is "one trillion, nine hundred ninety-seven billion, seven hundred seventy-three million, fifty-seven thousand, four hundred seventy-six".