12810745477 has 8 divisors (see below), whose sum is σ = 13057364376. Its totient is φ = 12566464512.

The previous prime is 12810745427. The next prime is 12810745483. The reversal of 12810745477 is 77454701821.

It can be written as a sum of positive squares in 4 ways, for example, as 2137582756 + 10673162721 = 46234^2 + 103311^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12810745477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12810745417) 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 7 ways as a sum of consecutive naturals, for example, 573418 + ... + 595339.

It is an arithmetic number, because the mean of its divisors is an integer number (1632170547).

Almost surely, 2^12810745477 is an apocalyptic number.

It is an amenable number.

12810745477 is a deficient number, since it is larger than the sum of its proper divisors (246618899).

12810745477 is a wasteful number, since it uses less digits than its factorization.

12810745477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168967.

The product of its (nonzero) digits is 439040, while the sum is 46.

The spelling of 12810745477 in words is "twelve billion, eight hundred ten million, seven hundred forty-five thousand, four hundred seventy-seven".