12547788295681 has 4 divisors (see below), whose sum is σ = 13208198206000. Its totient is φ = 11887378385364.

The previous prime is 12547788295663. The next prime is 12547788295697. The reversal of 12547788295681 is 18659288774521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12547788295681 - 2⁹ = 12547788295169 is a prime.

It is a super-2 number, since 2×12547788295681² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12547788295621) 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, 330204955131 + ... + 330204955168.

It is an arithmetic number, because the mean of its divisors is an integer number (3302049551500).

Almost surely, 2^{12547788295681} is an apocalyptic number.

It is an amenable number.

12547788295681 is a deficient number, since it is larger than the sum of its proper divisors (660409910319).

12547788295681 is an equidigital number, since it uses as much as digits as its factorization.

12547788295681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660409910318.

The product of its digits is 541900800, while the sum is 73.

The spelling of 12547788295681 in words is "twelve trillion, five hundred forty-seven billion, seven hundred eighty-eight million, two hundred ninety-five thousand, six hundred eighty-one".