25520517414 has 72 divisors (see below), whose sum is σ = 64396610928. Its totient is φ = 7283132640.

The previous prime is 25520517403. The next prime is 25520517427. The reversal of 25520517414 is 41471502552.

25520517414 is a `hidden beast` number, since 2 + 5 + 520 + 51 + 74 + 14 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 766024 + ... + 798644.

It is an arithmetic number, because the mean of its divisors is an integer number (894397374).

Almost surely, 2^25520517414 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25520517414, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32198305464).

25520517414 is an abundant number, since it is smaller than the sum of its proper divisors (38876093514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25520517414 is a wasteful number, since it uses less digits than its factorization.

25520517414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33530 (or 33520 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The spelling of 25520517414 in words is "twenty-five billion, five hundred twenty million, five hundred seventeen thousand, four hundred fourteen".