978625685884 has 48 divisors (see below), whose sum is σ = 2135740352256. Its totient is φ = 381183264000.

The previous prime is 978625685867. The next prime is 978625685887. The reversal of 978625685884 is 488586526879.

It is a super-2 number, since 2×978625685884² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 978625685884.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978625685887) 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 15 ways as a sum of consecutive naturals, for example, 773572 + ... + 1598644.

It is an arithmetic number, because the mean of its divisors is an integer number (44494590672).

Almost surely, 2^978625685884 is an apocalyptic number.

It is an amenable number.

978625685884 is an abundant number, since it is smaller than the sum of its proper divisors (1157114666372).

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

978625685884 is a wasteful number, since it uses less digits than its factorization.

978625685884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828946 (or 828944 counting only the distinct ones).

The product of its digits is 1857945600, while the sum is 76.

The spelling of 978625685884 in words is "nine hundred seventy-eight billion, six hundred twenty-five million, six hundred eighty-five thousand, eight hundred eighty-four".