1105501561161 has 4 divisors (see below), whose sum is σ = 1474002081552. Its totient is φ = 737001040772.

The previous prime is 1105501561159. The next prime is 1105501561163. The reversal of 1105501561161 is 1611651055011.

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 an interprime number because it is at equal distance from previous prime (1105501561159) and next prime (1105501561163).

It is a cyclic number.

It is not a de Polignac number, because 1105501561161 - 2¹ = 1105501561159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1105501561163) 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, 184250260191 + ... + 184250260196.

It is an arithmetic number, because the mean of its divisors is an integer number (368500520388).

Almost surely, 2^{1105501561161} is an apocalyptic number.

It is an amenable number.

1105501561161 is a deficient number, since it is larger than the sum of its proper divisors (368500520391).

1105501561161 is an equidigital number, since it uses as much as digits as its factorization.

1105501561161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368500520390.

The product of its (nonzero) digits is 4500, while the sum is 33.

The spelling of 1105501561161 in words is "one trillion, one hundred five billion, five hundred one million, five hundred sixty-one thousand, one hundred sixty-one".