655161761 has 4 divisors (see below), whose sum is σ = 656890800. Its totient is φ = 653432724.

The previous prime is 655161757. The next prime is 655161763. The reversal of 655161761 is 167161556.

655161761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 655161761 - 2² = 655161757 is a prime.

It is a super-2 number, since 2×655161761² = 858473866153242242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655161763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 863951 + ... + 864708.

It is an arithmetic number, because the mean of its divisors is an integer number (164222700).

Almost surely, 2^655161761 is an apocalyptic number.

It is an amenable number.

655161761 is a deficient number, since it is larger than the sum of its proper divisors (1729039).

655161761 is a wasteful number, since it uses less digits than its factorization.

655161761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729038.

The product of its digits is 37800, while the sum is 38.

The square root of 655161761 is about 25596.1278516888. The cubic root of 655161761 is about 868.5260465389.

The spelling of 655161761 in words is "six hundred fifty-five million, one hundred sixty-one thousand, seven hundred sixty-one".