878420422656 has 1040 divisors, whose sum is σ = 3345356424960. Its totient is φ = 223590481920.

The previous prime is 878420422609. The next prime is 878420422657. The reversal of 878420422656 is 656224024878.

878420422656 is a `hidden beast` number, since 87 + 84 + 2 + 0 + 422 + 65 + 6 = 666.

It is a super-3 number, since 3×878420422656³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878420422657) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 750144951 + ... + 750146121.

Almost surely, 2^878420422656 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 878420422656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1672678212480).

878420422656 is an abundant number, since it is smaller than the sum of its proper divisors (2466936002304).

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

878420422656 is a wasteful number, since it uses less digits than its factorization.

878420422656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250 (or 1219 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 54.

The spelling of 878420422656 in words is "eight hundred seventy-eight billion, four hundred twenty million, four hundred twenty-two thousand, six hundred fifty-six".