80611005 has 16 divisors (see below), whose sum is σ = 133138944. Its totient is φ = 41605440.

The previous prime is 80611001. The next prime is 80611007. The reversal of 80611005 is 50011608.

It is not a de Polignac number, because 80611005 - 2² = 80611001 is a prime.

It is a super-2 number, since 2×80611005² = 12996268254220050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80611001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86214 + ... + 87143.

It is an arithmetic number, because the mean of its divisors is an integer number (8321184).

Almost surely, 2^80611005 is an apocalyptic number.

It is an amenable number.

80611005 is a deficient number, since it is larger than the sum of its proper divisors (52527939).

80611005 is a wasteful number, since it uses less digits than its factorization.

80611005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173396.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 80611005 is about 8978.3631581709. The cubic root of 80611005 is about 431.9811323636.

It can be divided in two parts, 806 and 11005, that added together give a palindrome (11811).

The spelling of 80611005 in words is "eighty million, six hundred eleven thousand, five".