25138536440830 has 64 divisors (see below), whose sum is σ = 45718042291200. Its totient is φ = 9951780593664.

The previous prime is 25138536440779. The next prime is 25138536440837. The reversal of 25138536440830 is 3804463583152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25138536440837) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1239134947 + ... + 1239155233.

It is an arithmetic number, because the mean of its divisors is an integer number (714344410800).

Almost surely, 2^{25138536440830} is an apocalyptic number.

25138536440830 is a deficient number, since it is larger than the sum of its proper divisors (20579505850370).

25138536440830 is a wasteful number, since it uses less digits than its factorization.

25138536440830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23413.

The product of its (nonzero) digits is 8294400, while the sum is 52.

The spelling of 25138536440830 in words is "twenty-five trillion, one hundred thirty-eight billion, five hundred thirty-six million, four hundred forty thousand, eight hundred thirty".