78851779344 has 120 divisors (see below), whose sum is σ = 245083584480. Its totient is φ = 24262063488.

The previous prime is 78851779339. The next prime is 78851779417. The reversal of 78851779344 is 44397715887.

78851779344 is a `hidden beast` number, since 7 + 8 + 8 + 517 + 79 + 3 + 44 = 666.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 467014 + ... + 613029.

It is an arithmetic number, because the mean of its divisors is an integer number (2042363204).

Almost surely, 2^78851779344 is an apocalyptic number.

It is an amenable number.

78851779344 is an abundant number, since it is smaller than the sum of its proper divisors (166231805136).

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

78851779344 is a wasteful number, since it uses less digits than its factorization.

78851779344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080086 (or 1080061 counting only the distinct ones).

The product of its digits is 47416320, while the sum is 63.

The spelling of 78851779344 in words is "seventy-eight billion, eight hundred fifty-one million, seven hundred seventy-nine thousand, three hundred forty-four".