78747643049 has 32 divisors (see below), whose sum is σ = 87562944000. Its totient is φ = 70491230208.

The previous prime is 78747643003. The next prime is 78747643129. The reversal of 78747643049 is 94034674787.

It is not a de Polignac number, because 78747643049 - 2²⁴ = 78730865833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78747643549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44314049 + ... + 44315825.

It is an arithmetic number, because the mean of its divisors is an integer number (2736342000).

Almost surely, 2^78747643049 is an apocalyptic number.

It is an amenable number.

78747643049 is a deficient number, since it is larger than the sum of its proper divisors (8815300951).

78747643049 is a wasteful number, since it uses less digits than its factorization.

78747643049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3377.

The product of its (nonzero) digits is 28449792, while the sum is 59.

The spelling of 78747643049 in words is "seventy-eight billion, seven hundred forty-seven million, six hundred forty-three thousand, forty-nine".