985902399481 has 4 divisors (see below), whose sum is σ = 1043896658292. Its totient is φ = 927908140672.

The previous prime is 985902399473. The next prime is 985902399533. The reversal of 985902399481 is 184993209589.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 646642747881 + 339259651600 = 804141^2 + 582460^2 .

It is a cyclic number.

It is not a de Polignac number, because 985902399481 - 2³ = 985902399473 is a prime.

It is a super-2 number, since 2×985902399481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (985902399281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28997129380 + ... + 28997129413.

It is an arithmetic number, because the mean of its divisors is an integer number (260974164573).

Almost surely, 2^985902399481 is an apocalyptic number.

It is an amenable number.

985902399481 is a deficient number, since it is larger than the sum of its proper divisors (57994258811).

985902399481 is a wasteful number, since it uses less digits than its factorization.

985902399481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57994258810.

The product of its (nonzero) digits is 50388480, while the sum is 67.

The spelling of 985902399481 in words is "nine hundred eighty-five billion, nine hundred two million, three hundred ninety-nine thousand, four hundred eighty-one".