161111206617 has 16 divisors (see below), whose sum is σ = 227593654272. Its totient is φ = 101026033920.

The previous prime is 161111206579. The next prime is 161111206637. The reversal of 161111206617 is 716602111161.

It is a happy number.

It is not a de Polignac number, because 161111206617 - 2²⁷ = 160976988889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161111206637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 907609 + ... + 1070502.

It is an arithmetic number, because the mean of its divisors is an integer number (14224603392).

Almost surely, 2^161111206617 is an apocalyptic number.

161111206617 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

161111206617 is a deficient number, since it is larger than the sum of its proper divisors (66482447655).

161111206617 is a wasteful number, since it uses less digits than its factorization.

161111206617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979728.

The product of its (nonzero) digits is 3024, while the sum is 33.

Adding to 161111206617 its reverse (716602111161), we get a palindrome (877713317778).

The spelling of 161111206617 in words is "one hundred sixty-one billion, one hundred eleven million, two hundred six thousand, six hundred seventeen".