25543142533 has 4 divisors (see below), whose sum is σ = 25553350048. Its totient is φ = 25532935020.

The previous prime is 25543142519. The next prime is 25543142543. The reversal of 25543142533 is 33524134552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25543142533 - 2²¹ = 25541045381 is a prime.

It is a super-2 number, since 2×25543142533² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25543142492 and 25543142501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25543142543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5100003 + ... + 5105008.

It is an arithmetic number, because the mean of its divisors is an integer number (6388337512).

Almost surely, 2^25543142533 is an apocalyptic number.

It is an amenable number.

25543142533 is a deficient number, since it is larger than the sum of its proper divisors (10207515).

25543142533 is a wasteful number, since it uses less digits than its factorization.

25543142533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10207514.

The product of its digits is 216000, while the sum is 37.

The spelling of 25543142533 in words is "twenty-five billion, five hundred forty-three million, one hundred forty-two thousand, five hundred thirty-three".