2628143261 has 2 divisors, whose sum is σ = 2628143262. Its totient is φ = 2628143260.

The previous prime is 2628143249. The next prime is 2628143267. The reversal of 2628143261 is 1623418262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2614379161 + 13764100 = 51131^2 + 3710^2 .

It is a cyclic number.

It is not a de Polignac number, because 2628143261 - 2⁶ = 2628143197 is a prime.

It is a super-3 number, since 3×2628143261³ (a number of 29 digits) contains 333 as substring.

It is a Sophie Germain 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 (2628143267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1314071630 + 1314071631.

It is an arithmetic number, because the mean of its divisors is an integer number (1314071631).

Almost surely, 2^2628143261 is an apocalyptic number.

It is an amenable number.

2628143261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2628143261 is an equidigital number, since it uses as much as digits as its factorization.

2628143261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 35.

The square root of 2628143261 is about 51265.4197388454. The cubic root of 2628143261 is about 1380.0124729321.

The spelling of 2628143261 in words is "two billion, six hundred twenty-eight million, one hundred forty-three thousand, two hundred sixty-one".