25406245672 has 32 divisors (see below), whose sum is σ = 49196378880. Its totient is φ = 12287594880.

The previous prime is 25406245651. The next prime is 25406245679. The reversal of 25406245672 is 27654260452.

It is not an unprimeable number, because it can be changed into a prime (25406245679) 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, 533428 + ... + 579100.

It is an arithmetic number, because the mean of its divisors is an integer number (1537386840).

Almost surely, 2^25406245672 is an apocalyptic number.

It is an amenable number.

25406245672 is a deficient number, since it is larger than the sum of its proper divisors (23790133208).

25406245672 is a wasteful number, since it uses less digits than its factorization.

25406245672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47953 (or 47949 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 43.

The spelling of 25406245672 in words is "twenty-five billion, four hundred six million, two hundred forty-five thousand, six hundred seventy-two".