70809565 has 8 divisors (see below), whose sum is σ = 85147488. Its totient is φ = 56530320.

The previous prime is 70809559. The next prime is 70809569. The reversal of 70809565 is 56590807.

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 70809565 - 2⁵ = 70809533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70809569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11967 + ... + 16876.

It is an arithmetic number, because the mean of its divisors is an integer number (10643436).

Almost surely, 2^70809565 is an apocalyptic number.

It is an amenable number.

70809565 is a deficient number, since it is larger than the sum of its proper divisors (14337923).

70809565 is a wasteful number, since it uses less digits than its factorization.

70809565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29339.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 70809565 is about 8414.8419474165. The cubic root of 70809565 is about 413.7112290745.

The spelling of 70809565 in words is "seventy million, eight hundred nine thousand, five hundred sixty-five".