2625370991 has 2 divisors, whose sum is σ = 2625370992. Its totient is φ = 2625370990.

The previous prime is 2625370987. The next prime is 2625371003. The reversal of 2625370991 is 1990735262.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2625370991 - 2² = 2625370987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2625370921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1312685495 + 1312685496.

It is an arithmetic number, because the mean of its divisors is an integer number (1312685496).

Almost surely, 2^2625370991 is an apocalyptic number.

2625370991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2625370991 is an equidigital number, since it uses as much as digits as its factorization.

2625370991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 2625370991 is about 51238.3742033254. The cubic root of 2625370991 is about 1379.5270715445.

The spelling of 2625370991 in words is "two billion, six hundred twenty-five million, three hundred seventy thousand, nine hundred ninety-one".