1312655743557 has 8 divisors (see below), whose sum is σ = 1944675175680. Its totient is φ = 875103829020.

The previous prime is 1312655743541. The next prime is 1312655743577. The reversal of 1312655743557 is 7553475562131.

1312655743557 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 6 + 557 + 4 + 35 + 57 = 666.

It is not a de Polignac number, because 1312655743557 - 2⁴ = 1312655743541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312655743507) 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, 24308439669 + ... + 24308439722.

It is an arithmetic number, because the mean of its divisors is an integer number (243084396960).

Almost surely, 2^{1312655743557} is an apocalyptic number.

It is an amenable number.

1312655743557 is a deficient number, since it is larger than the sum of its proper divisors (632019432123).

1312655743557 is an equidigital number, since it uses as much as digits as its factorization.

1312655743557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48616879400 (or 48616879394 counting only the distinct ones).

The product of its digits is 13230000, while the sum is 54.

The spelling of 1312655743557 in words is "one trillion, three hundred twelve billion, six hundred fifty-five million, seven hundred forty-three thousand, five hundred fifty-seven".