78744169413 has 64 divisors (see below), whose sum is σ = 143640967680. Its totient is φ = 41517494784.

The previous prime is 78744169321. The next prime is 78744169429. The reversal of 78744169413 is 31496144787.

It is a happy number.

78744169413 is a `hidden beast` number, since 78 + 74 + 416 + 94 + 1 + 3 = 666.

It is not a de Polignac number, because 78744169413 - 2¹² = 78744165317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78744169413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78744169433) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 7250095 + ... + 7260947.

It is an arithmetic number, because the mean of its divisors is an integer number (2244390120).

Almost surely, 2^78744169413 is an apocalyptic number.

It is an amenable number.

78744169413 is a deficient number, since it is larger than the sum of its proper divisors (64896798267).

78744169413 is a wasteful number, since it uses less digits than its factorization.

78744169413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13835 (or 13829 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The spelling of 78744169413 in words is "seventy-eight billion, seven hundred forty-four million, one hundred sixty-nine thousand, four hundred thirteen".