985788045292778 has 216 divisors, whose sum is σ = 1895217856966980. Its totient is φ = 383266903219200.

The previous prime is 985788045292769. The next prime is 985788045292793. The reversal of 985788045292778 is 877292540887589.

It can be written as a sum of positive squares in 18 ways, for example, as 131952938003929 + 853835107288849 = 11487077^2 + 29220457^2 .

It is a super-2 number, since 2×985788045292778² (a number of 31 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 985788045292693 and 985788045292702.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 81409527788 + ... + 81409539896.

Almost surely, 2^{985788045292778} is an apocalyptic number.

985788045292778 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

985788045292778 is a deficient number, since it is larger than the sum of its proper divisors (909429811674202).

985788045292778 is a wasteful number, since it uses less digits than its factorization.

985788045292778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13594 (or 13513 counting only the distinct ones).

The product of its (nonzero) digits is 45519667200, while the sum is 89.

The spelling of 985788045292778 in words is "nine hundred eighty-five trillion, seven hundred eighty-eight billion, forty-five million, two hundred ninety-two thousand, seven hundred seventy-eight".