978797607040 has 128 divisors (see below), whose sum is σ = 2576080584000. Its totient is φ = 352660746240.

The previous prime is 978797607037. The next prime is 978797607041. The reversal of 978797607040 is 40706797879.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (64).

It is not an unprimeable number, because it can be changed into a prime (978797607041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129591 + ... + 1405129.

Almost surely, 2^978797607040 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 978797607040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1288040292000).

978797607040 is an abundant number, since it is smaller than the sum of its proper divisors (1597282976960).

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

978797607040 is a wasteful number, since it uses less digits than its factorization.

978797607040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275678 (or 1275666 counting only the distinct ones).

The product of its (nonzero) digits is 37340352, while the sum is 64.

The spelling of 978797607040 in words is "nine hundred seventy-eight billion, seven hundred ninety-seven million, six hundred seven thousand, forty".