12520377860857 has 8 divisors (see below), whose sum is σ = 12828094908552. Its totient is φ = 12212772336000.

The previous prime is 12520377860839. The next prime is 12520377860869. The reversal of 12520377860857 is 75806877302521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 151728946576 + 12368648914281 = 389524^2 + 3516909^2 .

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

It is not a de Polignac number, because 12520377860857 - 2¹¹ = 12520377858809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12520377860795 and 12520377860804.

It is not an unprimeable number, because it can be changed into a prime (12520377860897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27653394 + ... + 28102507.

It is an arithmetic number, because the mean of its divisors is an integer number (1603511863569).

Almost surely, 2^{12520377860857} is an apocalyptic number.

It is an amenable number.

12520377860857 is a deficient number, since it is larger than the sum of its proper divisors (307717047695).

12520377860857 is an equidigital number, since it uses as much as digits as its factorization.

12520377860857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55761419.

The product of its (nonzero) digits is 39513600, while the sum is 61.

The spelling of 12520377860857 in words is "twelve trillion, five hundred twenty billion, three hundred seventy-seven million, eight hundred sixty thousand, eight hundred fifty-seven".