25870956345 has 24 divisors (see below), whose sum is σ = 48292452936. Its totient is φ = 12736470528.

The previous prime is 25870956341. The next prime is 25870956361. The reversal of 25870956345 is 54365907852.

25870956345 is a `hidden beast` number, since 2 + 5 + 8 + 70 + 9 + 563 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2587553424 + 23283402921 = 50868^2 + 152589^2 .

It is not a de Polignac number, because 25870956345 - 2² = 25870956341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25870956291 and 25870956300.

It is not an unprimeable number, because it can be changed into a prime (25870956341) 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 23 ways as a sum of consecutive naturals, for example, 22111344 + ... + 22112513.

It is an arithmetic number, because the mean of its divisors is an integer number (2012185539).

Almost surely, 2^25870956345 is an apocalyptic number.

It is an amenable number.

25870956345 is a deficient number, since it is larger than the sum of its proper divisors (22421496591).

25870956345 is a wasteful number, since it uses less digits than its factorization.

25870956345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44223881 (or 44223878 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 54.

The spelling of 25870956345 in words is "twenty-five billion, eight hundred seventy million, nine hundred fifty-six thousand, three hundred forty-five".