25256043870 has 32 divisors (see below), whose sum is σ = 62092910880. Its totient is φ = 6570677760.

The previous prime is 25256043847. The next prime is 25256043877. The reversal of 25256043870 is 7834065252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25256043877) 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, 10265455 + ... + 10267914.

It is an arithmetic number, because the mean of its divisors is an integer number (1940403465).

Almost surely, 2^25256043870 is an apocalyptic number.

25256043870 is an abundant number, since it is smaller than the sum of its proper divisors (36836867010).

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

25256043870 is a wasteful number, since it uses less digits than its factorization.

25256043870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20533420.

The product of its (nonzero) digits is 403200, while the sum is 42.

The spelling of 25256043870 in words is "twenty-five billion, two hundred fifty-six million, forty-three thousand, eight hundred seventy".