25173507212 has 12 divisors (see below), whose sum is σ = 50347014480. Its totient is φ = 10788645936.

The previous prime is 25173507211. The next prime is 25173507253. The reversal of 25173507212 is 21270537152.

25173507212 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (25173507211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449526887 + ... + 449526942.

It is an arithmetic number, because the mean of its divisors is an integer number (4195584540).

Almost surely, 2^25173507212 is an apocalyptic number.

It is an amenable number.

25173507212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25173507212 is a wasteful number, since it uses less digits than its factorization.

25173507212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899053840 (or 899053838 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The spelling of 25173507212 in words is "twenty-five billion, one hundred seventy-three million, five hundred seven thousand, two hundred twelve".