1131511712557 has 8 divisors (see below), whose sum is σ = 1150127024312. Its totient is φ = 1112898528000.

The previous prime is 1131511712549. The next prime is 1131511712581. The reversal of 1131511712557 is 7552171151311.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10515682116 + 1120996030441 = 102546^2 + 1058771^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1131511712557 - 2³ = 1131511712549 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 (1131511712257) 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, 559057 + ... + 1604857.

It is an arithmetic number, because the mean of its divisors is an integer number (143765878039).

Almost surely, 2^{1131511712557} is an apocalyptic number.

It is an amenable number.

1131511712557 is a deficient number, since it is larger than the sum of its proper divisors (18615311755).

1131511712557 is a wasteful number, since it uses less digits than its factorization.

1131511712557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063599.

The product of its digits is 36750, while the sum is 40.

Adding to 1131511712557 its reverse (7552171151311), we get a palindrome (8683682863868).

The spelling of 1131511712557 in words is "one trillion, one hundred thirty-one billion, five hundred eleven million, seven hundred twelve thousand, five hundred fifty-seven".