12536755763521 has 4 divisors (see below), whose sum is σ = 13676460832944. Its totient is φ = 11397050694100.

The previous prime is 12536755763479. The next prime is 12536755763599.

12536755763521 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12536755763521 - 2³¹ = 12534608279873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12536755763221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569852534695 + ... + 569852534716.

It is an arithmetic number, because the mean of its divisors is an integer number (3419115208236).

Almost surely, 2^{12536755763521} is an apocalyptic number.

12536755763521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12536755763521 is a deficient number, since it is larger than the sum of its proper divisors (1139705069423).

12536755763521 is a wasteful number, since it uses less digits than its factorization.

12536755763521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139705069422.

The product of its digits is 39690000, while the sum is 58.

The spelling of 12536755763521 in words is "twelve trillion, five hundred thirty-six billion, seven hundred fifty-five million, seven hundred sixty-three thousand, five hundred twenty-one".