78473668340 has 24 divisors (see below), whose sum is σ = 164816081640. Its totient is φ = 31385395328.

The previous prime is 78473668337. The next prime is 78473668373. The reversal of 78473668340 is 4386637487.

It can be written as a sum of positive squares in 4 ways, for example, as 2186123536 + 76287544804 = 46756^2 + 276202^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94007 + ... + 407166.

It is an arithmetic number, because the mean of its divisors is an integer number (6867336735).

Almost surely, 2^78473668340 is an apocalyptic number.

It is an amenable number.

78473668340 is an abundant number, since it is smaller than the sum of its proper divisors (86342413300).

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

78473668340 is a wasteful number, since it uses less digits than its factorization.

78473668340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509011 (or 509009 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 56.

The spelling of 78473668340 in words is "seventy-eight billion, four hundred seventy-three million, six hundred sixty-eight thousand, three hundred forty".