80805261 has 4 divisors (see below), whose sum is σ = 107740352. Its totient is φ = 53870172.

The previous prime is 80805259. The next prime is 80805289. The reversal of 80805261 is 16250808.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 80805261 - 2¹ = 80805259 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 (80805061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13467541 + ... + 13467546.

It is an arithmetic number, because the mean of its divisors is an integer number (26935088).

Almost surely, 2^80805261 is an apocalyptic number.

It is an amenable number.

80805261 is a deficient number, since it is larger than the sum of its proper divisors (26935091).

80805261 is a wasteful number, since it uses less digits than its factorization.

80805261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26935090.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 80805261 is about 8989.1746562184. The cubic root of 80805261 is about 432.3278493369.

The spelling of 80805261 in words is "eighty million, eight hundred five thousand, two hundred sixty-one".