25915039001 has 4 divisors (see below), whose sum is σ = 25915367604. Its totient is φ = 25914710400.

The previous prime is 25915038997. The next prime is 25915039013. The reversal of 25915039001 is 10093051952.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 18074113600 + 7840925401 = 134440^2 + 88549^2 .

It is a cyclic number.

It is not a de Polignac number, because 25915039001 - 2² = 25915038997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25915039081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32861 + ... + 230021.

It is an arithmetic number, because the mean of its divisors is an integer number (6478841901).

It is a Poulet number, since it divides 2^25915039000-1.

Almost surely, 2^25915039001 is an apocalyptic number.

25915039001 is the 131441-st pentagonal number.

It is an amenable number.

25915039001 is a deficient number, since it is larger than the sum of its proper divisors (328603).

25915039001 is a wasteful number, since it uses less digits than its factorization.

25915039001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328602.

The product of its (nonzero) digits is 12150, while the sum is 35.

The spelling of 25915039001 in words is "twenty-five billion, nine hundred fifteen million, thirty-nine thousand, one".