25520212505 has 8 divisors (see below), whose sum is σ = 30640991424. Its totient is φ = 20405012400.

The previous prime is 25520212499. The next prime is 25520212519. The reversal of 25520212505 is 50521202552.

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

It is not a de Polignac number, because 25520212505 - 2¹² = 25520208409 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, 1384631 + ... + 1402940.

It is an arithmetic number, because the mean of its divisors is an integer number (3830123928).

Almost surely, 2^25520212505 is an apocalyptic number.

It is an amenable number.

25520212505 is a deficient number, since it is larger than the sum of its proper divisors (5120778919).

25520212505 is a wasteful number, since it uses less digits than its factorization.

25520212505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2789407.

The product of its (nonzero) digits is 10000, while the sum is 29.

The spelling of 25520212505 in words is "twenty-five billion, five hundred twenty million, two hundred twelve thousand, five hundred five".