78635345 has 4 divisors (see below), whose sum is σ = 94362420. Its totient is φ = 62908272.

The previous prime is 78635329. The next prime is 78635351. The reversal of 78635345 is 54353687.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42719296 + 35916049 = 6536^2 + 5993^2 .

It is a cyclic number.

It is not a de Polignac number, because 78635345 - 2⁴ = 78635329 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7863530 + ... + 7863539.

It is an arithmetic number, because the mean of its divisors is an integer number (23590605).

Almost surely, 2^78635345 is an apocalyptic number.

It is an amenable number.

78635345 is a deficient number, since it is larger than the sum of its proper divisors (15727075).

78635345 is a wasteful number, since it uses less digits than its factorization.

78635345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15727074.

The product of its digits is 302400, while the sum is 41.

The square root of 78635345 is about 8867.6572441655. The cubic root of 78635345 is about 428.4228232661.

The spelling of 78635345 in words is "seventy-eight million, six hundred thirty-five thousand, three hundred forty-five".