1655065601 has 6 divisors (see below), whose sum is σ = 1925280450. Its totient is φ = 1418627616.

The previous prime is 1655065591. The next prime is 1655065613. The reversal of 1655065601 is 1065605561.

It can be written as a sum of positive squares in only one way, i.e., 1637011600 + 18054001 = 40460^2 + 4249^2 .

It is not a de Polignac number, because 1655065601 - 2²⁶ = 1587956737 is a prime.

It is a super-2 number, since 2×1655065601² = 5478484287226982402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1655065631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16888376 + ... + 16888473.

It is an arithmetic number, because the mean of its divisors is an integer number (320880075).

Almost surely, 2^1655065601 is an apocalyptic number.

It is an amenable number.

1655065601 is a deficient number, since it is larger than the sum of its proper divisors (270214849).

1655065601 is an equidigital number, since it uses as much as digits as its factorization.

1655065601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33776863 (or 33776856 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 1655065601 is about 40682.4974774165. The cubic root of 1655065601 is about 1182.8737771331.

The spelling of 1655065601 in words is "one billion, six hundred fifty-five million, sixty-five thousand, six hundred one".