25421723210 has 16 divisors (see below), whose sum is σ = 49279032936. Its totient is φ = 9386482368.

The previous prime is 25421723209. The next prime is 25421723213. The reversal of 25421723210 is 1232712452.

It can be written as a sum of positive squares in 4 ways, for example, as 21685213081 + 3736510129 = 147259^2 + 61127^2 .

It is not an unprimeable number, because it can be changed into a prime (25421723213) 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 7 ways as a sum of consecutive naturals, for example, 97775729 + ... + 97775988.

Almost surely, 2^25421723210 is an apocalyptic number.

25421723210 is a deficient number, since it is larger than the sum of its proper divisors (23857309726).

25421723210 is a wasteful number, since it uses less digits than its factorization.

25421723210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195551737.

The product of its (nonzero) digits is 6720, while the sum is 29.

The spelling of 25421723210 in words is "twenty-five billion, four hundred twenty-one million, seven hundred twenty-three thousand, two hundred ten".