25010232561 has 12 divisors (see below), whose sum is σ = 36531801540. Its totient is φ = 16486145280.

The previous prime is 25010232557. The next prime is 25010232571. The reversal of 25010232561 is 16523201052.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7045923600 + 17964308961 = 83940^2 + 134031^2 .

It is not a de Polignac number, because 25010232561 - 2² = 25010232557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25010232571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15611080 + ... + 15612681.

It is an arithmetic number, because the mean of its divisors is an integer number (3044316795).

Almost surely, 2^25010232561 is an apocalyptic number.

It is an amenable number.

25010232561 is a deficient number, since it is larger than the sum of its proper divisors (11521568979).

25010232561 is a wasteful number, since it uses less digits than its factorization.

25010232561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31223856 (or 31223853 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 25010232561 in words is "twenty-five billion, ten million, two hundred thirty-two thousand, five hundred sixty-one".