25606634852 has 6 divisors (see below), whose sum is σ = 44811610998. Its totient is φ = 12803317424.

The previous prime is 25606634821. The next prime is 25606634869. The reversal of 25606634852 is 25843660652.

It can be written as a sum of positive squares in only one way, i.e., 19459134016 + 6147500836 = 139496^2 + 78406^2 .

It is a super-2 number, since 2×25606634852² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25606634797 and 25606634806.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200829353 + ... + 3200829360.

It is an arithmetic number, because the mean of its divisors is an integer number (7468601833).

Almost surely, 2^25606634852 is an apocalyptic number.

It is an amenable number.

25606634852 is a deficient number, since it is larger than the sum of its proper divisors (19204976146).

25606634852 is a wasteful number, since it uses less digits than its factorization.

25606634852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6401658717 (or 6401658715 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 47.

The spelling of 25606634852 in words is "twenty-five billion, six hundred six million, six hundred thirty-four thousand, eight hundred fifty-two".