25543434552 has 64 divisors (see below), whose sum is σ = 67846096800. Its totient is φ = 7998681600.

The previous prime is 25543434551. The next prime is 25543434563.

25543434552 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25543434551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 470199 + ... + 521702.

Almost surely, 2^25543434552 is an apocalyptic number.

It is an amenable number.

25543434552 is an abundant number, since it is smaller than the sum of its proper divisors (42302662248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25543434552 is a wasteful number, since it uses less digits than its factorization.

25543434552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991976 (or 991972 counting only the distinct ones).

The product of its digits is 1440000, while the sum is 42.

The spelling of 25543434552 in words is "twenty-five billion, five hundred forty-three million, four hundred thirty-four thousand, five hundred fifty-two".