2625908081 has 2 divisors, whose sum is σ = 2625908082. Its totient is φ = 2625908080.

The previous prime is 2625908071. The next prime is 2625908107. The reversal of 2625908081 is 1808095262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1782528400 + 843379681 = 42220^2 + 29041^2 .

It is a cyclic number.

It is not a de Polignac number, because 2625908081 - 2²² = 2621713777 is a prime.

It is a super-2 number, since 2×2625908081² = 13790786499722205122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2625908071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1312954040 + 1312954041.

It is an arithmetic number, because the mean of its divisors is an integer number (1312954041).

Almost surely, 2^2625908081 is an apocalyptic number.

It is an amenable number.

2625908081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2625908081 is an equidigital number, since it uses as much as digits as its factorization.

2625908081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 2625908081 is about 51243.6150266548. The cubic root of 2625908081 is about 1379.6211382088.

The spelling of 2625908081 in words is "two billion, six hundred twenty-five million, nine hundred eight thousand, eighty-one".