1957573151689 has 3 divisors (see below), whose sum is σ = 1957574550823. Its totient is φ = 1957571752556.

The previous prime is 1957573151669. The next prime is 1957573151719. The reversal of 1957573151689 is 9861513757591.

The square root of 1957573151689 is 1399133.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1894022775225 + 63550376464 = 1376235^2 + 252092^2 .

It is not a de Polignac number, because 1957573151689 - 2¹⁹ = 1957572627401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1957573151609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 699567 + ... + 2098699.

Almost surely, 2^{1957573151689} is an apocalyptic number.

1957573151689 is the 1399133-rd square number.

1957573151689 is the 699567-th centered octagonal number.

It is an amenable number.

1957573151689 is a deficient number, since it is larger than the sum of its proper divisors (1399134).

1957573151689 is an frugal number, since it uses more digits than its factorization.

1957573151689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2798266 (or 1399133 counting only the distinct ones).

The product of its digits is 71442000, while the sum is 67.

The spelling of 1957573151689 in words is "one trillion, nine hundred fifty-seven billion, five hundred seventy-three million, one hundred fifty-one thousand, six hundred eighty-nine".