25087091049 has 6 divisors (see below), whose sum is σ = 36236909306. Its totient is φ = 16724727360.

The previous prime is 25087091041. The next prime is 25087091087. The reversal of 25087091049 is 94019078052.

It can be written as a sum of positive squares in only one way, i.e., 12869768025 + 12217323024 = 113445^2 + 110532^2 .

It is not a de Polignac number, because 25087091049 - 2³ = 25087091041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25087090995 and 25087091013.

It is not an unprimeable number, because it can be changed into a prime (25087091041) 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 5 ways as a sum of consecutive naturals, for example, 1393727272 + ... + 1393727289.

Almost surely, 2^25087091049 is an apocalyptic number.

It is an amenable number.

25087091049 is a deficient number, since it is larger than the sum of its proper divisors (11149818257).

25087091049 is a wasteful number, since it uses less digits than its factorization.

25087091049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2787454567 (or 2787454564 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 25087091049 in words is "twenty-five billion, eighty-seven million, ninety-one thousand, forty-nine".