25481581412 has 48 divisors (see below), whose sum is σ = 53196471552. Its totient is φ = 10442424960.

The previous prime is 25481581373. The next prime is 25481581417. The reversal of 25481581412 is 21418518452.

It is a self number, because there is not a number n which added to its sum of digits gives 25481581412.

It is not an unprimeable number, because it can be changed into a prime (25481581417) 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, 3095462 + ... + 3103682.

It is an arithmetic number, because the mean of its divisors is an integer number (1108259824).

Almost surely, 2^25481581412 is an apocalyptic number.

It is an amenable number.

25481581412 is an abundant number, since it is smaller than the sum of its proper divisors (27714890140).

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

25481581412 is a wasteful number, since it uses less digits than its factorization.

25481581412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13068 (or 13066 counting only the distinct ones).

The product of its digits is 102400, while the sum is 41.

The spelling of 25481581412 in words is "twenty-five billion, four hundred eighty-one million, five hundred eighty-one thousand, four hundred twelve".