78285859947 has 12 divisors (see below), whose sum is σ = 113125259520. Its totient is φ = 52169488368.

The previous prime is 78285859921. The next prime is 78285859969. The reversal of 78285859947 is 74995858287.

78285859947 is a `hidden beast` number, since 7 + 8 + 28 + 5 + 8 + 599 + 4 + 7 = 666.

It is not a de Polignac number, because 78285859947 - 2⁷ = 78285859819 is a prime.

It is a super-2 number, since 2×78285859947² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78285859247) 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 11 ways as a sum of consecutive naturals, for example, 1733547 + ... + 1778132.

It is an arithmetic number, because the mean of its divisors is an integer number (9427104960).

Almost surely, 2^78285859947 is an apocalyptic number.

78285859947 is a deficient number, since it is larger than the sum of its proper divisors (34839399573).

78285859947 is a wasteful number, since it uses less digits than its factorization.

78285859947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3514162 (or 3514159 counting only the distinct ones).

The product of its digits is 406425600, while the sum is 72.

The spelling of 78285859947 in words is "seventy-eight billion, two hundred eighty-five million, eight hundred fifty-nine thousand, nine hundred forty-seven".