25122715505 has 8 divisors (see below), whose sum is σ = 30149744832. Its totient is φ = 20096514928.

The previous prime is 25122715493. The next prime is 25122715537. The reversal of 25122715505 is 50551722152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25122715505 - 2⁴ = 25122715489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138419 + ... + 263448.

It is an arithmetic number, because the mean of its divisors is an integer number (3768718104).

Almost surely, 2^25122715505 is an apocalyptic number.

It is an amenable number.

25122715505 is a deficient number, since it is larger than the sum of its proper divisors (5027029327).

25122715505 is a wasteful number, since it uses less digits than its factorization.

25122715505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414375.

The product of its (nonzero) digits is 35000, while the sum is 35.

The spelling of 25122715505 in words is "twenty-five billion, one hundred twenty-two million, seven hundred fifteen thousand, five hundred five".