78858550944 has 384 divisors, whose sum is σ = 242771558400. Its totient is φ = 24873246720.

The previous prime is 78858550943. The next prime is 78858550963. The reversal of 78858550944 is 44905585887.

78858550944 is a `hidden beast` number, since 7 + 8 + 8 + 5 + 85 + 509 + 44 = 666.

It is a super-2 number, since 2×78858550944² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (78858550943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 329951977 + ... + 329952215.

It is an arithmetic number, because the mean of its divisors is an integer number (632217600).

Almost surely, 2^78858550944 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 78858550944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121385779200).

78858550944 is an abundant number, since it is smaller than the sum of its proper divisors (163913007456).

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

78858550944 is a wasteful number, since it uses less digits than its factorization.

78858550944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513 (or 499 counting only the distinct ones).

The product of its (nonzero) digits is 64512000, while the sum is 63.

The spelling of 78858550944 in words is "seventy-eight billion, eight hundred fifty-eight million, five hundred fifty thousand, nine hundred forty-four".