12551767606597 has 4 divisors (see below), whose sum is σ = 12572934163020. Its totient is φ = 12530601050176.

The previous prime is 12551767606591. The next prime is 12551767606613. The reversal of 12551767606597 is 79560676715521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8936715640356 + 3615051966241 = 2989434^2 + 1901329^2 .

It is a cyclic number.

It is not a de Polignac number, because 12551767606597 - 2²³ = 12551759217989 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12551767606591) 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 3 ways as a sum of consecutive naturals, for example, 10583277322 + ... + 10583278507.

It is an arithmetic number, because the mean of its divisors is an integer number (3143233540755).

Almost surely, 2^{12551767606597} is an apocalyptic number.

It is an amenable number.

12551767606597 is a deficient number, since it is larger than the sum of its proper divisors (21166556423).

12551767606597 is an equidigital number, since it uses as much as digits as its factorization.

12551767606597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21166556422.

The product of its (nonzero) digits is 166698000, while the sum is 67.

The spelling of 12551767606597 in words is "twelve trillion, five hundred fifty-one billion, seven hundred sixty-seven million, six hundred six thousand, five hundred ninety-seven".