12582123077 has 4 divisors (see below), whose sum is σ = 13015989420. Its totient is φ = 12148256736.

The previous prime is 12582123061. The next prime is 12582123137. The reversal of 12582123077 is 77032128521.

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 4419723361 + 8162399716 = 66481^2 + 90346^2 .

It is a cyclic number.

It is not a de Polignac number, because 12582123077 - 2⁴ = 12582123061 is a prime.

It is a super-2 number, since 2×12582123077² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12582123077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12582123017) 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, 216933128 + ... + 216933185.

It is an arithmetic number, because the mean of its divisors is an integer number (3253997355).

Almost surely, 2^12582123077 is an apocalyptic number.

It is an amenable number.

12582123077 is a deficient number, since it is larger than the sum of its proper divisors (433866343).

12582123077 is an equidigital number, since it uses as much as digits as its factorization.

12582123077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433866342.

The product of its (nonzero) digits is 47040, while the sum is 38.

The spelling of 12582123077 in words is "twelve billion, five hundred eighty-two million, one hundred twenty-three thousand, seventy-seven".