78285747185 has 16 divisors (see below), whose sum is σ = 96546600000. Its totient is φ = 60895066176.

The previous prime is 78285747097. The next prime is 78285747203. The reversal of 78285747185 is 58174758287.

It is a cyclic number.

It is not a de Polignac number, because 78285747185 - 2³⁰ = 77212005361 is a prime.

It is a super-2 number, since 2×78285747185² (a number of 23 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 136166 + ... + 418464.

It is an arithmetic number, because the mean of its divisors is an integer number (6034162500).

Almost surely, 2^78285747185 is an apocalyptic number.

It is an amenable number.

78285747185 is a deficient number, since it is larger than the sum of its proper divisors (18260852815).

78285747185 is a wasteful number, since it uses less digits than its factorization.

78285747185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283840.

The product of its digits is 35123200, while the sum is 62.

The spelling of 78285747185 in words is "seventy-eight billion, two hundred eighty-five million, seven hundred forty-seven thousand, one hundred eighty-five".