655163261 has 2 divisors, whose sum is σ = 655163262. Its totient is φ = 655163260.

The previous prime is 655163227. The next prime is 655163279. The reversal of 655163261 is 162361556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 353064100 + 302099161 = 18790^2 + 17381^2 .

It is a cyclic number.

It is not a de Polignac number, because 655163261 - 2²² = 650968957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55163261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327581630 + 327581631.

It is an arithmetic number, because the mean of its divisors is an integer number (327581631).

Almost surely, 2^655163261 is an apocalyptic number.

It is an amenable number.

655163261 is a deficient number, since it is larger than the sum of its proper divisors (1).

655163261 is an equidigital number, since it uses as much as digits as its factorization.

655163261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 35.

The square root of 655163261 is about 25596.1571529790. The cubic root of 655163261 is about 868.5267093717.

The spelling of 655163261 in words is "six hundred fifty-five million, one hundred sixty-three thousand, two hundred sixty-one".