25487855361 has 10 divisors (see below), whose sum is σ = 38074450722. Its totient is φ = 16991903520.

The previous prime is 25487855357. The next prime is 25487855377. The reversal of 25487855361 is 16355878452.

25487855361 is a `hidden beast` number, since 2 + 5 + 4 + 87 + 8 + 553 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17694320400 + 7793534961 = 133020^2 + 88281^2 .

It is not a de Polignac number, because 25487855361 - 2² = 25487855357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25487855298 and 25487855307.

It is not an unprimeable number, because it can be changed into a prime (25487855381) by changing a digit.

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 in 9 ways as a sum of consecutive naturals, for example, 157332360 + ... + 157332521.

Almost surely, 2^25487855361 is an apocalyptic number.

It is an amenable number.

25487855361 is a deficient number, since it is larger than the sum of its proper divisors (12586595361).

25487855361 is an equidigital number, since it uses as much as digits as its factorization.

25487855361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314664893 (or 314664884 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 54.

The spelling of 25487855361 in words is "twenty-five billion, four hundred eighty-seven million, eight hundred fifty-five thousand, three hundred sixty-one".