988378051869 has 12 divisors (see below), whose sum is σ = 1537476969756. Its totient is φ = 608232647232.

The previous prime is 988378051849. The next prime is 988378051879. The reversal of 988378051869 is 968150873889.

It can be written as a sum of positive squares in 2 ways, for example, as 254893716900 + 733484334969 = 504870^2 + 856437^2 .

It is not a de Polignac number, because 988378051869 - 2²⁷ = 988243834141 is a prime.

It is a super-2 number, since 2×988378051869² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 988378051797 and 988378051806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988378051849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4223837712 + ... + 4223837945.

It is an arithmetic number, because the mean of its divisors is an integer number (128123080813).

Almost surely, 2^988378051869 is an apocalyptic number.

It is an amenable number.

988378051869 is a deficient number, since it is larger than the sum of its proper divisors (549098917887).

988378051869 is a wasteful number, since it uses less digits than its factorization.

988378051869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8447675676 (or 8447675673 counting only the distinct ones).

The product of its (nonzero) digits is 209018880, while the sum is 72.

The spelling of 988378051869 in words is "nine hundred eighty-eight billion, three hundred seventy-eight million, fifty-one thousand, eight hundred sixty-nine".