78759945 has 96 divisors (see below), whose sum is σ = 158505984. Its totient is φ = 37195200.

The previous prime is 78759943. The next prime is 78759953. The reversal of 78759945 is 54995787.

78759945 is a `hidden beast` number, since 7 + 8 + 7 + 599 + 45 = 666.

It is not a de Polignac number, because 78759945 - 2¹ = 78759943 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78759891 and 78759900.

It is not an unprimeable number, because it can be changed into a prime (78759943) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 948874 + ... + 948956.

It is an arithmetic number, because the mean of its divisors is an integer number (1651104).

Almost surely, 2^78759945 is an apocalyptic number.

It is an amenable number.

78759945 is an abundant number, since it is smaller than the sum of its proper divisors (79746039).

78759945 is a wasteful number, since it uses less digits than its factorization.

78759945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 173 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 54.

The square root of 78759945 is about 8874.6799942308. The cubic root of 78759945 is about 428.6489866778.

The spelling of 78759945 in words is "seventy-eight million, seven hundred fifty-nine thousand, nine hundred forty-five".