117016211561 has 4 divisors (see below), whose sum is σ = 117028348500. Its totient is φ = 117004074624.

The previous prime is 117016211549. The next prime is 117016211567. The reversal of 117016211561 is 165112610711.

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

It can be written as a sum of positive squares in 2 ways, for example, as 32186154025 + 84830057536 = 179405^2 + 291256^2 .

It is a cyclic number.

It is not a de Polignac number, because 117016211561 - 2⁶ = 117016211497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (117016211567) 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, 6053996 + ... + 6073293.

It is an arithmetic number, because the mean of its divisors is an integer number (29257087125).

Almost surely, 2^117016211561 is an apocalyptic number.

It is an amenable number.

117016211561 is a deficient number, since it is larger than the sum of its proper divisors (12136939).

117016211561 is an equidigital number, since it uses as much as digits as its factorization.

117016211561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12136938.

The product of its (nonzero) digits is 2520, while the sum is 32.

The spelling of 117016211561 in words is "one hundred seventeen billion, sixteen million, two hundred eleven thousand, five hundred sixty-one".