985403655624 has 128 divisors (see below), whose sum is σ = 2625461222400. Its totient is φ = 307328774400.

The previous prime is 985403655553. The next prime is 985403655637. The reversal of 985403655624 is 426556304589.

It is a Cunningham number, because it is equal to 992675²-1.

It is a Harshad number since it is a multiple of its sum of digits (57).

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 31 ways as a sum of consecutive naturals, for example, 11870727 + ... + 11953449.

It is an arithmetic number, because the mean of its divisors is an integer number (20511415800).

Almost surely, 2^985403655624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 985403655624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1312730611200).

985403655624 is an abundant number, since it is smaller than the sum of its proper divisors (1640057566776).

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

985403655624 is a wasteful number, since it uses less digits than its factorization.

985403655624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83075 (or 83071 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 57.

The spelling of 985403655624 in words is "nine hundred eighty-five billion, four hundred three million, six hundred fifty-five thousand, six hundred twenty-four".