25033078561 has 12 divisors (see below), whose sum is σ = 27093989052. Its totient is φ = 23115991808.

The previous prime is 25033078559. The next prime is 25033078573. The reversal of 25033078561 is 16587033052.

It can be written as a sum of positive squares in 6 ways, for example, as 3315456400 + 21717622161 = 57580^2 + 147369^2 .

It is not a de Polignac number, because 25033078561 - 2¹ = 25033078559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25633078561) 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 11 ways as a sum of consecutive naturals, for example, 801850 + ... + 832483.

It is an arithmetic number, because the mean of its divisors is an integer number (2257832421).

Almost surely, 2^25033078561 is an apocalyptic number.

It is an amenable number.

25033078561 is a deficient number, since it is larger than the sum of its proper divisors (2060910491).

25033078561 is a wasteful number, since it uses less digits than its factorization.

25033078561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634420 (or 1634403 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 25033078561 in words is "twenty-five billion, thirty-three million, seventy-eight thousand, five hundred sixty-one".