1655655161 has 16 divisors (see below), whose sum is σ = 1787194368. Its totient is φ = 1529299200.

The previous prime is 1655655149. The next prime is 1655655247. The reversal of 1655655161 is 1615565561.

It is a cyclic number.

It is not a de Polignac number, because 1655655161 - 2¹⁸ = 1655393017 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 (1655657161) 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, 369245 + ... + 373701.

It is an arithmetic number, because the mean of its divisors is an integer number (111699648).

Almost surely, 2^1655655161 is an apocalyptic number.

It is an amenable number.

1655655161 is a deficient number, since it is larger than the sum of its proper divisors (131539207).

1655655161 is a wasteful number, since it uses less digits than its factorization.

1655655161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5032.

The product of its digits is 135000, while the sum is 41.

The square root of 1655655161 is about 40689.7427000958. The cubic root of 1655655161 is about 1183.0142131123.

It can be divided in two parts, 16556 and 55161, that added together give a palindrome (71717).

The spelling of 1655655161 in words is "one billion, six hundred fifty-five million, six hundred fifty-five thousand, one hundred sixty-one".