25121005408 has 12 divisors (see below), whose sum is σ = 49456979460. Its totient is φ = 12560502688.

The previous prime is 25121005391. The next prime is 25121005423. The reversal of 25121005408 is 80450012152.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 392515678 + ... + 392515741.

It is an arithmetic number, because the mean of its divisors is an integer number (4121414955).

Almost surely, 2^25121005408 is an apocalyptic number.

It is an amenable number.

25121005408 is a deficient number, since it is larger than the sum of its proper divisors (24335974052).

25121005408 is an equidigital number, since it uses as much as digits as its factorization.

25121005408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785031429 (or 785031421 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

The spelling of 25121005408 in words is "twenty-five billion, one hundred twenty-one million, five thousand, four hundred eight".