25121041553 has 4 divisors (see below), whose sum is σ = 25799988660. Its totient is φ = 24442094448.

The previous prime is 25121041529. The next prime is 25121041591. The reversal of 25121041553 is 35514012152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24246538369 + 874503184 = 155713^2 + 29572^2 .

It is a cyclic number.

It is not a de Polignac number, because 25121041553 - 2¹⁶ = 25120976017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25121041513) 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 3 ways as a sum of consecutive naturals, for example, 339473498 + ... + 339473571.

It is an arithmetic number, because the mean of its divisors is an integer number (6449997165).

Almost surely, 2^25121041553 is an apocalyptic number.

It is an amenable number.

25121041553 is a deficient number, since it is larger than the sum of its proper divisors (678947107).

25121041553 is an equidigital number, since it uses as much as digits as its factorization.

25121041553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678947106.

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 25121041553 in words is "twenty-five billion, one hundred twenty-one million, forty-one thousand, five hundred fifty-three".