985925750821 has 24 divisors (see below), whose sum is σ = 1104426241632. Its totient is φ = 879165487200.

The previous prime is 985925750813. The next prime is 985925750869. The reversal of 985925750821 is 128057529589.

It is not a de Polignac number, because 985925750821 - 2³ = 985925750813 is a prime.

It is a super-2 number, since 2×985925750821² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 985925750821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985925750881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29143006 + ... + 29176816.

It is an arithmetic number, because the mean of its divisors is an integer number (46017760068).

Almost surely, 2^985925750821 is an apocalyptic number.

It is an amenable number.

985925750821 is a deficient number, since it is larger than the sum of its proper divisors (118500490811).

985925750821 is a wasteful number, since it uses less digits than its factorization.

985925750821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38433 (or 38422 counting only the distinct ones).

The product of its (nonzero) digits is 18144000, while the sum is 61.

The spelling of 985925750821 in words is "nine hundred eighty-five billion, nine hundred twenty-five million, seven hundred fifty thousand, eight hundred twenty-one".