161111206616 has 32 divisors (see below), whose sum is σ = 305325696000. Its totient is φ = 79692608160.

The previous prime is 161111206579. The next prime is 161111206637. The reversal of 161111206616 is 616602111161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 717935 + ... + 915233.

It is an arithmetic number, because the mean of its divisors is an integer number (9541428000).

Almost surely, 2^161111206616 is an apocalyptic number.

It is an amenable number.

161111206616 is a deficient number, since it is larger than the sum of its proper divisors (144214489384).

161111206616 is a wasteful number, since it uses less digits than its factorization.

161111206616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198399 (or 198395 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

Adding to 161111206616 its reverse (616602111161), we get a palindrome (777713317777).

The spelling of 161111206616 in words is "one hundred sixty-one billion, one hundred eleven million, two hundred six thousand, six hundred sixteen".