12787626778537 has 16 divisors (see below), whose sum is σ = 13963040250880. Its totient is φ = 11639678009472.

The previous prime is 12787626778529. The next prime is 12787626778559. The reversal of 12787626778537 is 73587762678721.

It is a cyclic number.

It is not a de Polignac number, because 12787626778537 - 2³ = 12787626778529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12787626778237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2782264 + ... + 5772022.

It is an arithmetic number, because the mean of its divisors is an integer number (872690015680).

Almost surely, 2^{12787626778537} is an apocalyptic number.

It is an amenable number.

12787626778537 is a deficient number, since it is larger than the sum of its proper divisors (1175413472343).

12787626778537 is a wasteful number, since it uses less digits than its factorization.

12787626778537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2994352.

The product of its digits is 2323399680, while the sum is 76.

The spelling of 12787626778537 in words is "twelve trillion, seven hundred eighty-seven billion, six hundred twenty-six million, seven hundred seventy-eight thousand, five hundred thirty-seven".