655507161 has 40 divisors (see below), whose sum is σ = 1003622400. Its totient is φ = 426254400.

The previous prime is 655507147. The next prime is 655507241. The reversal of 655507161 is 161705556.

It is not a de Polignac number, because 655507161 - 2⁷ = 655507033 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655505161) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 568936 + ... + 570086.

It is an arithmetic number, because the mean of its divisors is an integer number (25090560).

Almost surely, 2^655507161 is an apocalyptic number.

It is an amenable number.

655507161 is a deficient number, since it is larger than the sum of its proper divisors (348115239).

655507161 is a wasteful number, since it uses less digits than its factorization.

655507161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331 (or 1322 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The square root of 655507161 is about 25602.8740769469. The cubic root of 655507161 is about 868.6786481364.

The spelling of 655507161 in words is "six hundred fifty-five million, five hundred seven thousand, one hundred sixty-one".