1653155261 has 2 divisors, whose sum is σ = 1653155262. Its totient is φ = 1653155260.

The previous prime is 1653155209. The next prime is 1653155263. The reversal of 1653155261 is 1625513561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1243902361 + 409252900 = 35269^2 + 20230^2 .

It is a cyclic number.

It is not a de Polignac number, because 1653155261 - 2¹⁸ = 1652893117 is a prime.

It is a Sophie Germain prime.

Together with 1653155263, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1653155263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 826577630 + 826577631.

It is an arithmetic number, because the mean of its divisors is an integer number (826577631).

Almost surely, 2^1653155261 is an apocalyptic number.

It is an amenable number.

1653155261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1653155261 is an equidigital number, since it uses as much as digits as its factorization.

1653155261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 35.

The square root of 1653155261 is about 40659.0120514505. The cubic root of 1653155261 is about 1182.4184958731.

The spelling of 1653155261 in words is "one billion, six hundred fifty-three million, one hundred fifty-five thousand, two hundred sixty-one".