25145522561 has 8 divisors (see below), whose sum is σ = 25393642560. Its totient is φ = 24897479472.

The previous prime is 25145522531. The next prime is 25145522617. The reversal of 25145522561 is 16522554152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25145522561 - 2¹⁸ = 25145260417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25145522531) 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 7 ways as a sum of consecutive naturals, for example, 814931 + ... + 845223.

It is an arithmetic number, because the mean of its divisors is an integer number (3174205320).

Almost surely, 2^25145522561 is an apocalyptic number.

It is an amenable number.

25145522561 is a deficient number, since it is larger than the sum of its proper divisors (248119999).

25145522561 is a wasteful number, since it uses less digits than its factorization.

25145522561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38455.

The product of its digits is 120000, while the sum is 38.

The spelling of 25145522561 in words is "twenty-five billion, one hundred forty-five million, five hundred twenty-two thousand, five hundred sixty-one".