25543131078 has 32 divisors (see below), whose sum is σ = 53583312384. Its totient is φ = 8107994592.

The previous prime is 25543131059. The next prime is 25543131079. The reversal of 25543131078 is 87013134552.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25543131079) 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 15 ways as a sum of consecutive naturals, for example, 1213600 + ... + 1234467.

It is an arithmetic number, because the mean of its divisors is an integer number (1674478512).

Almost surely, 2^25543131078 is an apocalyptic number.

25543131078 is an abundant number, since it is smaller than the sum of its proper divisors (28040181306).

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

25543131078 is a wasteful number, since it uses less digits than its factorization.

25543131078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448156.

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 25543131078 in words is "twenty-five billion, five hundred forty-three million, one hundred thirty-one thousand, seventy-eight".