25012501505 has 4 divisors (see below), whose sum is σ = 30015001812. Its totient is φ = 20010001200.

The previous prime is 25012501457. The next prime is 25012501517. The reversal of 25012501505 is 50510521052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2776025344 + 22236476161 = 52688^2 + 149119^2 .

It is not a de Polignac number, because 25012501505 - 2⁶ = 25012501441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2501250146 + ... + 2501250155.

It is an arithmetic number, because the mean of its divisors is an integer number (7503750453).

Almost surely, 2^25012501505 is an apocalyptic number.

It is an amenable number.

25012501505 is a deficient number, since it is larger than the sum of its proper divisors (5002500307).

25012501505 is an equidigital number, since it uses as much as digits as its factorization.

25012501505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5002500306.

The product of its (nonzero) digits is 2500, while the sum is 26.

The spelling of 25012501505 in words is "twenty-five billion, twelve million, five hundred one thousand, five hundred five".