1117278116561 has 8 divisors (see below), whose sum is σ = 1147754918400. Its totient is φ = 1086816056688.

The previous prime is 1117278116509. The next prime is 1117278116569. The reversal of 1117278116561 is 1656118727111.

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 1117278116561 - 2¹⁴ = 1117278100177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1117278116569) 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, 3531761 + ... + 3835086.

It is an arithmetic number, because the mean of its divisors is an integer number (143469364800).

Almost surely, 2^{1117278116561} is an apocalyptic number.

It is an amenable number.

1117278116561 is a deficient number, since it is larger than the sum of its proper divisors (30476801839).

1117278116561 is an equidigital number, since it uses as much as digits as its factorization.

1117278116561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7370983.

The product of its digits is 141120, while the sum is 47.

The spelling of 1117278116561 in words is "one trillion, one hundred seventeen billion, two hundred seventy-eight million, one hundred sixteen thousand, five hundred sixty-one".