160661171611555 has 16 divisors (see below), whose sum is σ = 192963455788320. Its totient is φ = 128415582931968.

The previous prime is 160661171611553. The next prime is 160661171611561. The reversal of 160661171611555 is 555116171166061.

It is a cyclic number.

It is not a de Polignac number, because 160661171611555 - 2¹ = 160661171611553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (160661171611553) 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, 105802104 + ... + 107309866.

It is an arithmetic number, because the mean of its divisors is an integer number (12060215986770).

Almost surely, 2^{160661171611555} is an apocalyptic number.

160661171611555 is a deficient number, since it is larger than the sum of its proper divisors (32302284176765).

160661171611555 is a wasteful number, since it uses less digits than its factorization.

160661171611555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526550.

The product of its (nonzero) digits is 1134000, while the sum is 52.

The spelling of 160661171611555 in words is "one hundred sixty trillion, six hundred sixty-one billion, one hundred seventy-one million, six hundred eleven thousand, five hundred fifty-five".