25534043553 has 16 divisors (see below), whose sum is σ = 34402648896. Its totient is φ = 16844805120.

The previous prime is 25534043533. The next prime is 25534043593. The reversal of 25534043553 is 35534043552.

It is not a de Polignac number, because 25534043553 - 2⁶ = 25534043489 is a prime.

It is a super-3 number, since 3×25534043553³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (25534043533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46701 + ... + 230757.

It is an arithmetic number, because the mean of its divisors is an integer number (2150165556).

Almost surely, 2^25534043553 is an apocalyptic number.

It is an amenable number.

25534043553 is a deficient number, since it is larger than the sum of its proper divisors (8868605343).

25534043553 is a wasteful number, since it uses less digits than its factorization.

25534043553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184544.

The product of its (nonzero) digits is 540000, while the sum is 39.

Subtracting 25534043553 from its reverse (35534043552), we obtain a palindrome (9999999999).

The spelling of 25534043553 in words is "twenty-five billion, five hundred thirty-four million, forty-three thousand, five hundred fifty-three".