25505515541 has 8 divisors (see below), whose sum is σ = 28001424864. Its totient is φ = 23039143920.

The previous prime is 25505515517. The next prime is 25505515561. The reversal of 25505515541 is 14551550552.

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 25505515541 - 2²⁶ = 25438406677 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25505515495 and 25505515504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25505515561) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7382615 + ... + 7386068.

It is an arithmetic number, because the mean of its divisors is an integer number (3500178108).

Almost surely, 2^25505515541 is an apocalyptic number.

It is an amenable number.

25505515541 is a deficient number, since it is larger than the sum of its proper divisors (2495909323).

25505515541 is a wasteful number, since it uses less digits than its factorization.

25505515541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14768851.

The product of its (nonzero) digits is 125000, while the sum is 38.

The spelling of 25505515541 in words is "twenty-five billion, five hundred five million, five hundred fifteen thousand, five hundred forty-one".