7111566861557 has 8 divisors (see below), whose sum is σ = 7113227738400. Its totient is φ = 7109906166160.

The previous prime is 7111566861533. The next prime is 7111566861569. The reversal of 7111566861557 is 7551686651117.

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 7111566861557 - 2¹⁰ = 7111566860533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7111566861496 and 7111566861505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7111560861557) 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, 104913758 + ... + 104981520.

It is an arithmetic number, because the mean of its divisors is an integer number (889153467300).

Almost surely, 2^{7111566861557} is an apocalyptic number.

It is an amenable number.

7111566861557 is a deficient number, since it is larger than the sum of its proper divisors (1660876843).

7111566861557 is a wasteful number, since it uses less digits than its factorization.

7111566861557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90723.

The product of its digits is 10584000, while the sum is 59.

The spelling of 7111566861557 in words is "seven trillion, one hundred eleven billion, five hundred sixty-six million, eight hundred sixty-one thousand, five hundred fifty-seven".