78974578020 has 192 divisors, whose sum is σ = 246894407424. Its totient is φ = 18736619520.

The previous prime is 78974577967. The next prime is 78974578027. The reversal of 78974578020 is 2087547987.

It is not an unprimeable number, because it can be changed into a prime (78974578027) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2639464 + ... + 2669216.

It is an arithmetic number, because the mean of its divisors is an integer number (1285908372).

Almost surely, 2^78974578020 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 78974578020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123447203712).

78974578020 is an abundant number, since it is smaller than the sum of its proper divisors (167919829404).

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

78974578020 is a wasteful number, since it uses less digits than its factorization.

78974578020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29902 (or 29900 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 57.

The spelling of 78974578020 in words is "seventy-eight billion, nine hundred seventy-four million, five hundred seventy-eight thousand, twenty".