25543140312 has 32 divisors (see below), whose sum is σ = 64240243200. Its totient is φ = 8463394464.

The previous prime is 25543140253. The next prime is 25543140313. The reversal of 25543140312 is 21304134552.

It is a self number, because there is not a number n which added to its sum of digits gives 25543140312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25543140313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3182512 + ... + 3190527.

It is an arithmetic number, because the mean of its divisors is an integer number (2007507600).

Almost surely, 2^25543140312 is an apocalyptic number.

It is an amenable number.

25543140312 is an abundant number, since it is smaller than the sum of its proper divisors (38697102888).

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

25543140312 is a wasteful number, since it uses less digits than its factorization.

25543140312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6373215 (or 6373211 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 25543140312 its reverse (21304134552), we get a palindrome (46847274864).

The spelling of 25543140312 in words is "twenty-five billion, five hundred forty-three million, one hundred forty thousand, three hundred twelve".