9721025850 has 96 divisors (see below), whose sum is σ = 25959320640. Its totient is φ = 2398397440.

The previous prime is 9721025843. The next prime is 9721025869. The reversal of 9721025850 is 585201279.

It is a junction number, because it is equal to n+sod(n) for n = 9721025799 and 9721025808.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 118144 + ... + 182756.

It is an arithmetic number, because the mean of its divisors is an integer number (270409590).

Almost surely, 2^9721025850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9721025850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12979660320).

9721025850 is an abundant number, since it is smaller than the sum of its proper divisors (16238294790).

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

9721025850 is a wasteful number, since it uses less digits than its factorization.

9721025850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64704 (or 64699 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 9721025850 is about 98595.2628172368. The cubic root of 9721025850 is about 2134.2110590446.

The spelling of 9721025850 in words is "nine billion, seven hundred twenty-one million, twenty-five thousand, eight hundred fifty".