25543634552 has 8 divisors (see below), whose sum is σ = 47894314800. Its totient is φ = 12771817272.

The previous prime is 25543634549. The next prime is 25543634609.

25543634552 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×25543634552² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1596477152 + ... + 1596477167.

It is an arithmetic number, because the mean of its divisors is an integer number (5986789350).

Almost surely, 2^25543634552 is an apocalyptic number.

It is an amenable number.

25543634552 is a deficient number, since it is larger than the sum of its proper divisors (22350680248).

25543634552 is a wasteful number, since it uses less digits than its factorization.

25543634552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3192954325 (or 3192954321 counting only the distinct ones).

The product of its digits is 2160000, while the sum is 44.

The spelling of 25543634552 in words is "twenty-five billion, five hundred forty-three million, six hundred thirty-four thousand, five hundred fifty-two".