25525530052505 has 24 divisors (see below), whose sum is σ = 35858508878088. Its totient is φ = 17391735099648.

The previous prime is 25525530052501. The next prime is 25525530052537. The reversal of 25525530052505 is 50525003552552.

It can be written as a sum of positive squares in 4 ways, for example, as 3173966722969 + 22351563329536 = 1781563^2 + 4727744^2 .

It is not a de Polignac number, because 25525530052505 - 2² = 25525530052501 is a prime.

It is a super-2 number, since 2×25525530052505² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25525530052501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 331763564 + ... + 331840493.

It is an arithmetic number, because the mean of its divisors is an integer number (1494104536587).

Almost surely, 2^{25525530052505} is an apocalyptic number.

It is an amenable number.

25525530052505 is a deficient number, since it is larger than the sum of its proper divisors (10332978825583).

25525530052505 is a wasteful number, since it uses less digits than its factorization.

25525530052505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663604233 (or 663604226 counting only the distinct ones).

The product of its (nonzero) digits is 1875000, while the sum is 44.

The spelling of 25525530052505 in words is "twenty-five trillion, five hundred twenty-five billion, five hundred thirty million, fifty-two thousand, five hundred five".