1115560551511 has 4 divisors (see below), whose sum is σ = 1274926344592. Its totient is φ = 956194758432.

The previous prime is 1115560551509. The next prime is 1115560551517. The reversal of 1115560551511 is 1151550655111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1115560551511 - 2¹ = 1115560551509 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 (1115560551517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79682896530 + ... + 79682896543.

It is an arithmetic number, because the mean of its divisors is an integer number (318731586148).

Almost surely, 2^{1115560551511} is an apocalyptic number.

1115560551511 is a deficient number, since it is larger than the sum of its proper divisors (159365793081).

1115560551511 is an equidigital number, since it uses as much as digits as its factorization.

1115560551511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159365793080.

The product of its (nonzero) digits is 18750, while the sum is 37.

The spelling of 1115560551511 in words is "one trillion, one hundred fifteen billion, five hundred sixty million, five hundred fifty-one thousand, five hundred eleven".