25533142399 has 4 divisors (see below), whose sum is σ = 25535263464. Its totient is φ = 25531021336.

The previous prime is 25533142391. The next prime is 25533142429. The reversal of 25533142399 is 99324133552.

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

It is a cyclic number.

It is not a de Polignac number, because 25533142399 - 2³ = 25533142391 is a prime.

It is a super-2 number, since 2×25533142399² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25533142391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1042372 + ... + 1066585.

It is an arithmetic number, because the mean of its divisors is an integer number (6383815866).

Almost surely, 2^25533142399 is an apocalyptic number.

25533142399 is a deficient number, since it is larger than the sum of its proper divisors (2121065).

25533142399 is a wasteful number, since it uses less digits than its factorization.

25533142399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121064.

The product of its digits is 874800, while the sum is 46.

The spelling of 25533142399 in words is "twenty-five billion, five hundred thirty-three million, one hundred forty-two thousand, three hundred ninety-nine".