78749155394 has 16 divisors (see below), whose sum is σ = 145383056448. Its totient is φ = 31153511952.

The previous prime is 78749155367. The next prime is 78749155423. The reversal of 78749155394 is 49355194787.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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, 216343652 + ... + 216344015.

It is an arithmetic number, because the mean of its divisors is an integer number (9086441028).

Almost surely, 2^78749155394 is an apocalyptic number.

78749155394 is a deficient number, since it is larger than the sum of its proper divisors (66633901054).

78749155394 is a wasteful number, since it uses less digits than its factorization.

78749155394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432687689.

The product of its digits is 38102400, while the sum is 62.

The spelling of 78749155394 in words is "seventy-eight billion, seven hundred forty-nine million, one hundred fifty-five thousand, three hundred ninety-four".