78645275 has 12 divisors (see below), whose sum is σ = 102653400. Its totient is φ = 59604480.

The previous prime is 78645271. The next prime is 78645283. The reversal of 78645275 is 57254687.

It is not a de Polignac number, because 78645275 - 2² = 78645271 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78645271) 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, 82310 + ... + 83259.

It is an arithmetic number, because the mean of its divisors is an integer number (8554450).

Almost surely, 2^78645275 is an apocalyptic number.

78645275 is a deficient number, since it is larger than the sum of its proper divisors (24008125).

78645275 is a wasteful number, since it uses less digits than its factorization.

78645275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165598 (or 165593 counting only the distinct ones).

The product of its digits is 470400, while the sum is 44.

The square root of 78645275 is about 8868.2171263451. The cubic root of 78645275 is about 428.4408561221.

The spelling of 78645275 in words is "seventy-eight million, six hundred forty-five thousand, two hundred seventy-five".