25505515128055 has 8 divisors (see below), whose sum is σ = 30606899317344. Its totient is φ = 20404224660000.

The previous prime is 25505515128047. The next prime is 25505515128077. The reversal of 25505515128055 is 55082151550552.

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

It is not a de Polignac number, because 25505515128055 - 2³ = 25505515128047 is a prime.

It is a Duffinian number.

It is a congruent 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, 22830196 + ... + 23921305.

It is an arithmetic number, because the mean of its divisors is an integer number (3825862414668).

Almost surely, 2^{25505515128055} is an apocalyptic number.

25505515128055 is a deficient number, since it is larger than the sum of its proper divisors (5101384189289).

25505515128055 is a wasteful number, since it uses less digits than its factorization.

25505515128055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46860617.

The product of its (nonzero) digits is 2500000, while the sum is 49.

The spelling of 25505515128055 in words is "twenty-five trillion, five hundred five billion, five hundred fifteen million, one hundred twenty-eight thousand, fifty-five".