78872565 has 8 divisors (see below), whose sum is σ = 126196128. Its totient is φ = 42065360.

The previous prime is 78872539. The next prime is 78872581. The reversal of 78872565 is 56527887.

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

It is not a de Polignac number, because 78872565 - 2⁶ = 78872501 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2629071 + ... + 2629100.

It is an arithmetic number, because the mean of its divisors is an integer number (15774516).

Almost surely, 2^78872565 is an apocalyptic number.

It is an amenable number.

78872565 is a deficient number, since it is larger than the sum of its proper divisors (47323563).

78872565 is a wasteful number, since it uses less digits than its factorization.

78872565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5258179.

The product of its digits is 940800, while the sum is 48.

The square root of 78872565 is about 8881.0227451572. The cubic root of 78872565 is about 428.8531998630.

The spelling of 78872565 in words is "seventy-eight million, eight hundred seventy-two thousand, five hundred sixty-five".