2628505081 has 2 divisors, whose sum is σ = 2628505082. Its totient is φ = 2628505080.

The previous prime is 2628505079. The next prime is 2628505111. The reversal of 2628505081 is 1805058262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1676165481 + 952339600 = 40941^2 + 30860^2 .

It is a cyclic number.

It is not a de Polignac number, because 2628505081 - 2¹ = 2628505079 is a prime.

It is a super-2 number, since 2×2628505081² = 13818077921685633122, which contains 22 as substring.

Together with 2628505079, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2628505081.

It is not a weakly prime, because it can be changed into another prime (2628505001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1314252540 + 1314252541.

It is an arithmetic number, because the mean of its divisors is an integer number (1314252541).

Almost surely, 2^2628505081 is an apocalyptic number.

It is an amenable number.

2628505081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2628505081 is an equidigital number, since it uses as much as digits as its factorization.

2628505081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 2628505081 is about 51268.9485068691. The cubic root of 2628505081 is about 1380.0757994142.

The spelling of 2628505081 in words is "two billion, six hundred twenty-eight million, five hundred five thousand, eighty-one".