978643179975396 has 192 divisors, whose sum is σ = 2540139207065600. Its totient is φ = 291217252838400.

The previous prime is 978643179975367. The next prime is 978643179975431. The reversal of 978643179975396 is 693579971346879.

978643179975396 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (93).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 58395073665 + ... + 58395090423.

Almost surely, 2^{978643179975396} 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 978643179975396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1270069603532800).

978643179975396 is an abundant number, since it is smaller than the sum of its proper divisors (1561496027090204).

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

978643179975396 is a wasteful number, since it uses less digits than its factorization.

978643179975396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23970 (or 23968 counting only the distinct ones).

The product of its digits is 116661928320, while the sum is 93.

The spelling of 978643179975396 in words is "nine hundred seventy-eight trillion, six hundred forty-three billion, one hundred seventy-nine million, nine hundred seventy-five thousand, three hundred ninety-six".