12577823513 has 4 divisors (see below), whose sum is σ = 12578049828. Its totient is φ = 12577597200.

The previous prime is 12577823501. The next prime is 12577823551. The reversal of 12577823513 is 31532877521.

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 7710947344 + 4866876169 = 87812^2 + 69763^2 .

It is a cyclic number.

It is not a de Polignac number, because 12577823513 - 2¹⁰ = 12577822489 is a prime.

It is a super-2 number, since 2×12577823513² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12577823563) 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 3 ways as a sum of consecutive naturals, for example, 33995 + ... + 162207.

It is an arithmetic number, because the mean of its divisors is an integer number (3144512457).

Almost surely, 2^12577823513 is an apocalyptic number.

It is an amenable number.

12577823513 is a deficient number, since it is larger than the sum of its proper divisors (226315).

12577823513 is an equidigital number, since it uses as much as digits as its factorization.

12577823513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226314.

The product of its digits is 352800, while the sum is 44.

The spelling of 12577823513 in words is "twelve billion, five hundred seventy-seven million, eight hundred twenty-three thousand, five hundred thirteen".