25938330639 has 16 divisors (see below), whose sum is σ = 37287107424. Its totient is φ = 15943910400.

The previous prime is 25938330619. The next prime is 25938330667. The reversal of 25938330639 is 93603383952.

It is not a de Polignac number, because 25938330639 - 2⁹ = 25938330127 is a prime.

It is a super-2 number, since 2×25938330639² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25938330591 and 25938330600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25938330619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343102 + ... + 411819.

It is an arithmetic number, because the mean of its divisors is an integer number (2330444214).

Almost surely, 2^25938330639 is an apocalyptic number.

25938330639 is a deficient number, since it is larger than the sum of its proper divisors (11348776785).

25938330639 is a wasteful number, since it uses less digits than its factorization.

25938330639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755818.

The product of its (nonzero) digits is 3149280, while the sum is 51.

The spelling of 25938330639 in words is "twenty-five billion, nine hundred thirty-eight million, three hundred thirty thousand, six hundred thirty-nine".