70081565 has 8 divisors (see below), whose sum is σ = 89044920. Its totient is φ = 52767232.

The previous prime is 70081553. The next prime is 70081591. The reversal of 70081565 is 56518007.

It can be written as a sum of positive squares in 4 ways, for example, as 40018276 + 30063289 = 6326^2 + 5483^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 70081565 - 2²⁶ = 2972701 is a prime.

It is a super-2 number, since 2×70081565² = 9822851505698450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412160 + ... + 412329.

It is an arithmetic number, because the mean of its divisors is an integer number (11130615).

Almost surely, 2^70081565 is an apocalyptic number.

It is an amenable number.

70081565 is a deficient number, since it is larger than the sum of its proper divisors (18963355).

70081565 is a wasteful number, since it uses less digits than its factorization.

70081565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824511.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 70081565 is about 8371.4732873013. The cubic root of 70081565 is about 412.2885405316.

The spelling of 70081565 in words is "seventy million, eighty-one thousand, five hundred sixty-five".