25420343556 has 48 divisors (see below), whose sum is σ = 60159217664. Its totient is φ = 8353462176.

The previous prime is 25420343537. The next prime is 25420343591. The reversal of 25420343556 is 65534302452.

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 in 15 ways as a sum of consecutive naturals, for example, 229515 + ... + 321741.

Almost surely, 2^25420343556 is an apocalyptic number.

It is an amenable number.

25420343556 is an abundant number, since it is smaller than the sum of its proper divisors (34738874108).

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

25420343556 is a wasteful number, since it uses less digits than its factorization.

25420343556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92560 (or 92558 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 39.

The spelling of 25420343556 in words is "twenty-five billion, four hundred twenty million, three hundred forty-three thousand, five hundred fifty-six".