655907234161 has 9 divisors (see below), whose sum is σ = 657652293081. Its totient is φ = 654166799892.

The previous prime is 655907234093. The next prime is 655907234167. The reversal of 655907234161 is 161432709556.

The square root of 655907234161 is 809881.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 655907234161 - 2¹³ = 655907225969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655907234167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 394411216 + ... + 394412878.

It is an arithmetic number, because the mean of its divisors is an integer number (73072477009).

Almost surely, 2^655907234161 is an apocalyptic number.

655907234161 is the 809881-st square number.

655907234161 is the 404941-st centered octagonal number.

It is an amenable number.

655907234161 is a deficient number, since it is larger than the sum of its proper divisors (1745058920).

655907234161 is an frugal number, since it uses more digits than its factorization.

655907234161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4300 (or 2150 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 49.

Multiplying 655907234161 by its sum of digits (49), we get a square (32139454473889 = 5669167²).

The spelling of 655907234161 in words is "six hundred fifty-five billion, nine hundred seven million, two hundred thirty-four thousand, one hundred sixty-one".