79218645 has 16 divisors (see below), whose sum is σ = 138272832. Its totient is φ = 38408960.

The previous prime is 79218631. The next prime is 79218653. The reversal of 79218645 is 54681297.

It is not a de Polignac number, because 79218645 - 2⁵ = 79218613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79218597 and 79218606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239892 + ... + 240221.

It is an arithmetic number, because the mean of its divisors is an integer number (8642052).

Almost surely, 2^79218645 is an apocalyptic number.

It is an amenable number.

79218645 is a deficient number, since it is larger than the sum of its proper divisors (59054187).

79218645 is a wasteful number, since it uses less digits than its factorization.

79218645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480132.

The product of its digits is 120960, while the sum is 42.

The square root of 79218645 is about 8900.4856609064. The cubic root of 79218645 is about 429.4795307286.

The spelling of 79218645 in words is "seventy-nine million, two hundred eighteen thousand, six hundred forty-five".