78395840074 has 16 divisors (see below), whose sum is σ = 125349782400. Its totient is φ = 36664808544.

The previous prime is 78395840071. The next prime is 78395840113. The reversal of 78395840074 is 47004859387.

It is a super-2 number, since 2×78395840074² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78395839997 and 78395840024.

It is not an unprimeable number, because it can be changed into a prime (78395840071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13054267 + ... + 13060270.

It is an arithmetic number, because the mean of its divisors is an integer number (7834361400).

Almost surely, 2^78395840074 is an apocalyptic number.

78395840074 is a deficient number, since it is larger than the sum of its proper divisors (46953942326).

78395840074 is a wasteful number, since it uses less digits than its factorization.

78395840074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26114637.

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 78395840074 in words is "seventy-eight billion, three hundred ninety-five million, eight hundred forty thousand, seventy-four".