25615056503 has 2 divisors, whose sum is σ = 25615056504. Its totient is φ = 25615056502.

The previous prime is 25615056497. The next prime is 25615056539. The reversal of 25615056503 is 30565051652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25615056503 - 2⁴ = 25615056487 is a prime.

It is a super-2 number, since 2×25615056503² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25615056583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12807528251 + 12807528252.

It is an arithmetic number, because the mean of its divisors is an integer number (12807528252).

Almost surely, 2^25615056503 is an apocalyptic number.

25615056503 is a deficient number, since it is larger than the sum of its proper divisors (1).

25615056503 is an equidigital number, since it uses as much as digits as its factorization.

25615056503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135000, while the sum is 38.

The spelling of 25615056503 in words is "twenty-five billion, six hundred fifteen million, fifty-six thousand, five hundred three".