25006402439 has 2 divisors, whose sum is σ = 25006402440. Its totient is φ = 25006402438.

The previous prime is 25006402409. The next prime is 25006402459. The reversal of 25006402439 is 93420460052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25006402439 - 2¹² = 25006398343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25006402399 and 25006402408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25006402409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12503201219 + 12503201220.

It is an arithmetic number, because the mean of its divisors is an integer number (12503201220).

Almost surely, 2^25006402439 is an apocalyptic number.

25006402439 is a deficient number, since it is larger than the sum of its proper divisors (1).

25006402439 is an equidigital number, since it uses as much as digits as its factorization.

25006402439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 25006402439 in words is "twenty-five billion, six million, four hundred two thousand, four hundred thirty-nine".