12578729837 has 2 divisors, whose sum is σ = 12578729838. Its totient is φ = 12578729836.

The previous prime is 12578729789. The next prime is 12578729869. The reversal of 12578729837 is 73892787521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9876185641 + 2702544196 = 99379^2 + 51986^2 .

It is a cyclic number.

It is not a de Polignac number, because 12578729837 - 2⁶ = 12578729773 is a prime.

It is a super-3 number, since 3×12578729837³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12578729887) 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 as a sum of consecutive naturals, namely, 6289364918 + 6289364919.

It is an arithmetic number, because the mean of its divisors is an integer number (6289364919).

Almost surely, 2^12578729837 is an apocalyptic number.

It is an amenable number.

12578729837 is a deficient number, since it is larger than the sum of its proper divisors (1).

12578729837 is an equidigital number, since it uses as much as digits as its factorization.

12578729837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11854080, while the sum is 59.

The spelling of 12578729837 in words is "twelve billion, five hundred seventy-eight million, seven hundred twenty-nine thousand, eight hundred thirty-seven".