78756449193 has 12 divisors (see below), whose sum is σ = 113951160180. Its totient is φ = 52415755776.

The previous prime is 78756449171. The next prime is 78756449209. The reversal of 78756449193 is 39194465787.

78756449193 is a `hidden beast` number, since 7 + 8 + 7 + 56 + 4 + 491 + 93 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21363622569 + 57392826624 = 146163^2 + 239568^2 .

It is not a de Polignac number, because 78756449193 - 2³³ = 70166514601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78756449193.

It is not an unprimeable number, because it can be changed into a prime (78756449693) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7373008 + ... + 7383681.

It is an arithmetic number, because the mean of its divisors is an integer number (9495930015).

Almost surely, 2^78756449193 is an apocalyptic number.

It is an amenable number.

78756449193 is a deficient number, since it is larger than the sum of its proper divisors (35194710987).

78756449193 is a wasteful number, since it uses less digits than its factorization.

78756449193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14757288 (or 14757285 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The spelling of 78756449193 in words is "seventy-eight billion, seven hundred fifty-six million, four hundred forty-nine thousand, one hundred ninety-three".