78610565 has 8 divisors (see below), whose sum is σ = 102908448. Its totient is φ = 57171280.

The previous prime is 78610559. The next prime is 78610591. The reversal of 78610565 is 56501687.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78610565 - 2⁴ = 78610549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 714587 + ... + 714696.

It is an arithmetic number, because the mean of its divisors is an integer number (12863556).

Almost surely, 2^78610565 is an apocalyptic number.

It is an amenable number.

78610565 is a deficient number, since it is larger than the sum of its proper divisors (24297883).

78610565 is a wasteful number, since it uses less digits than its factorization.

78610565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429299.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 78610565 is about 8866.2599217483. The cubic root of 78610565 is about 428.3778162237.

The spelling of 78610565 in words is "seventy-eight million, six hundred ten thousand, five hundred sixty-five".