978954764984 has 72 divisors (see below), whose sum is σ = 2118929130360. Its totient is φ = 415360234368.

The previous prime is 978954764933. The next prime is 978954764993. The reversal of 978954764984 is 489467459879.

It is a super-3 number, since 3×978954764984³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 978954764899 and 978954764908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 807051962 + ... + 807053174.

It is an arithmetic number, because the mean of its divisors is an integer number (29429571255).

Almost surely, 2^978954764984 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 978954764984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1059464565180).

978954764984 is an abundant number, since it is smaller than the sum of its proper divisors (1139974365376).

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

978954764984 is an equidigital number, since it uses as much as digits as its factorization.

978954764984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657 (or 1331 counting only the distinct ones).

The product of its digits is 4389396480, while the sum is 80.

The spelling of 978954764984 in words is "nine hundred seventy-eight billion, nine hundred fifty-four million, seven hundred sixty-four thousand, nine hundred eighty-four".