2625397839 has 20 divisors (see below), whose sum is σ = 4152592224. Its totient is φ = 1647307584.

The previous prime is 2625397823. The next prime is 2625397861. The reversal of 2625397839 is 9387935262.

It is a happy number.

2625397839 is a `hidden beast` number, since 2 + 6 + 2 + 539 + 78 + 39 = 666.

It is not a de Polignac number, because 2625397839 - 2⁴ = 2625397823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2625397339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 951927 + ... + 954680.

Almost surely, 2^2625397839 is an apocalyptic number.

2625397839 is a deficient number, since it is larger than the sum of its proper divisors (1527194385).

2625397839 is a wasteful number, since it uses less digits than its factorization.

2625397839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906636 (or 1906627 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The square root of 2625397839 is about 51238.6361937942. The cubic root of 2625397839 is about 1379.5317740439.

The spelling of 2625397839 in words is "two billion, six hundred twenty-five million, three hundred ninety-seven thousand, eight hundred thirty-nine".