654016261 has 2 divisors, whose sum is σ = 654016262. Its totient is φ = 654016260.

The previous prime is 654016219. The next prime is 654016277. The reversal of 654016261 is 162610456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 553896225 + 100120036 = 23535^2 + 10006^2 .

It is a cyclic number.

It is not a de Polignac number, because 654016261 - 2⁹ = 654015749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654016361) 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 as a sum of consecutive naturals, namely, 327008130 + 327008131.

It is an arithmetic number, because the mean of its divisors is an integer number (327008131).

Almost surely, 2^654016261 is an apocalyptic number.

It is an amenable number.

654016261 is a deficient number, since it is larger than the sum of its proper divisors (1).

654016261 is an equidigital number, since it uses as much as digits as its factorization.

654016261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 654016261 is about 25573.7416308213. The cubic root of 654016261 is about 868.0195675578.

It can be divided in two parts, 6540 and 16261, that added together give a square (22801 = 151²).

The spelling of 654016261 in words is "six hundred fifty-four million, sixteen thousand, two hundred sixty-one".