25125026515 has 4 divisors (see below), whose sum is σ = 30150031824. Its totient is φ = 20100021208.

The previous prime is 25125026501. The next prime is 25125026519. The reversal of 25125026515 is 51562052152.

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

It is a cyclic number.

It is not a de Polignac number, because 25125026515 - 2⁵ = 25125026483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25125026519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2512502647 + ... + 2512502656.

It is an arithmetic number, because the mean of its divisors is an integer number (7537507956).

Almost surely, 2^25125026515 is an apocalyptic number.

25125026515 is a deficient number, since it is larger than the sum of its proper divisors (5025005309).

25125026515 is an equidigital number, since it uses as much as digits as its factorization.

25125026515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5025005308.

The product of its (nonzero) digits is 30000, while the sum is 34.

Adding to 25125026515 its reverse (51562052152), we get a palindrome (76687078667).

The spelling of 25125026515 in words is "twenty-five billion, one hundred twenty-five million, twenty-six thousand, five hundred fifteen".