110660561561 has 4 divisors (see below), whose sum is σ = 120720612624. Its totient is φ = 100600510500.

The previous prime is 110660561513. The next prime is 110660561563. The reversal of 110660561561 is 165165066011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110660561561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (110660561563) 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, 5030025515 + ... + 5030025536.

It is an arithmetic number, because the mean of its divisors is an integer number (30180153156).

Almost surely, 2^110660561561 is an apocalyptic number.

110660561561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

110660561561 is a deficient number, since it is larger than the sum of its proper divisors (10060051063).

110660561561 is a wasteful number, since it uses less digits than its factorization.

110660561561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10060051062.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 110660561561 in words is "one hundred ten billion, six hundred sixty million, five hundred sixty-one thousand, five hundred sixty-one".