425525321550 has 192 divisors, whose sum is σ = 1249171476480. Its totient is φ = 93794426880.

The previous prime is 425525321531. The next prime is 425525321581. The reversal of 425525321550 is 55123525524.

It is a junction number, because it is equal to n+sod(n) for n = 425525321499 and 425525321508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26270254 + ... + 26286446.

It is an arithmetic number, because the mean of its divisors is an integer number (6506101440).

Almost surely, 2^425525321550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 425525321550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (624585738240).

425525321550 is an abundant number, since it is smaller than the sum of its proper divisors (823646154930).

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

425525321550 is a wasteful number, since it uses less digits than its factorization.

425525321550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17107 (or 17102 counting only the distinct ones).

The product of its (nonzero) digits is 300000, while the sum is 39.

The spelling of 425525321550 in words is "four hundred twenty-five billion, five hundred twenty-five million, three hundred twenty-one thousand, five hundred fifty".