25521565116345 has 8 divisors (see below), whose sum is σ = 40834504186176. Its totient is φ = 13611501395376.

The previous prime is 25521565116331. The next prime is 25521565116347. The reversal of 25521565116345 is 54361156512552.

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

It is not a de Polignac number, because 25521565116345 - 2⁴ = 25521565116329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25521565116347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 850718837197 + ... + 850718837226.

It is an arithmetic number, because the mean of its divisors is an integer number (5104313023272).

Almost surely, 2^{25521565116345} is an apocalyptic number.

It is an amenable number.

25521565116345 is a deficient number, since it is larger than the sum of its proper divisors (15312939069831).

25521565116345 is a wasteful number, since it uses less digits than its factorization.

25521565116345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701437674431.

The product of its digits is 5400000, while the sum is 51.

The spelling of 25521565116345 in words is "twenty-five trillion, five hundred twenty-one billion, five hundred sixty-five million, one hundred sixteen thousand, three hundred forty-five".