25423204512 has 96 divisors (see below), whose sum is σ = 68201445312. Its totient is φ = 8289275904.

The previous prime is 25423204511. The next prime is 25423204517. The reversal of 25423204512 is 21540232452.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 25423204512.

It is not an unprimeable number, because it can be changed into a prime (25423204511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1707243 + ... + 1722069.

It is an arithmetic number, because the mean of its divisors is an integer number (710431722).

Almost surely, 2^25423204512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25423204512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34100722656).

25423204512 is an abundant number, since it is smaller than the sum of its proper divisors (42778240800).

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

25423204512 is a wasteful number, since it uses less digits than its factorization.

25423204512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15230 (or 15222 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 25423204512 its reverse (21540232452), we get a palindrome (46963436964).

The spelling of 25423204512 in words is "twenty-five billion, four hundred twenty-three million, two hundred four thousand, five hundred twelve".