78641058485979 has 80 divisors (see below), whose sum is σ = 131342432427360. Its totient is φ = 46477214208000.

The previous prime is 78641058485911. The next prime is 78641058485989. The reversal of 78641058485979 is 97958485014687.

78641058485979 is a `hidden beast` number, since 7 + 8 + 6 + 4 + 10 + 5 + 8 + 4 + 8 + 597 + 9 = 666.

It is not a de Polignac number, because 78641058485979 - 2¹² = 78641058481883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a junction number, because it is equal to n+sod(n) for n = 78641058485898 and 78641058485907.

It is not an unprimeable number, because it can be changed into a prime (78641058485989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 78445407 + ... + 79441575.

It is an arithmetic number, because the mean of its divisors is an integer number (1641780405342).

Almost surely, 2^{78641058485979} is an apocalyptic number.

78641058485979 is a deficient number, since it is larger than the sum of its proper divisors (52701373941381).

78641058485979 is a wasteful number, since it uses less digits than its factorization.

78641058485979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998394 (or 998385 counting only the distinct ones).

The product of its (nonzero) digits is 4877107200, while the sum is 81.

The spelling of 78641058485979 in words is "seventy-eight trillion, six hundred forty-one billion, fifty-eight million, four hundred eighty-five thousand, nine hundred seventy-nine".