1117687679557 has 2 divisors, whose sum is σ = 1117687679558. Its totient is φ = 1117687679556.

The previous prime is 1117687679531. The next prime is 1117687679599. The reversal of 1117687679557 is 7559767867111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 717453044676 + 400234634881 = 847026^2 + 632641^2 .

It is an emirp because it is prime and its reverse (7559767867111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1117687679557 is a prime.

It is a super-2 number, since 2×1117687679557² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1117687674557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558843839778 + 558843839779.

It is an arithmetic number, because the mean of its divisors is an integer number (558843839779).

Almost surely, 2^{1117687679557} is an apocalyptic number.

It is an amenable number.

1117687679557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1117687679557 is an equidigital number, since it uses as much as digits as its factorization.

1117687679557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155584800, while the sum is 70.

The spelling of 1117687679557 in words is "one trillion, one hundred seventeen billion, six hundred eighty-seven million, six hundred seventy-nine thousand, five hundred fifty-seven".