80452781 has 16 divisors (see below), whose sum is σ = 88335360. Its totient is φ = 73032960.

The previous prime is 80452777. The next prime is 80452807. The reversal of 80452781 is 18725408.

It is a cyclic number.

It is not a de Polignac number, because 80452781 - 2² = 80452777 is a prime.

It is a super-2 number, since 2×80452781² = 12945299941267922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80452741) 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, 36725 + ... + 38853.

It is an arithmetic number, because the mean of its divisors is an integer number (5520960).

Almost surely, 2^80452781 is an apocalyptic number.

It is an amenable number.

80452781 is a deficient number, since it is larger than the sum of its proper divisors (7882579).

80452781 is a wasteful number, since it uses less digits than its factorization.

80452781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 80452781 is about 8969.5474244802. The cubic root of 80452781 is about 431.6983151035.

The spelling of 80452781 in words is "eighty million, four hundred fifty-two thousand, seven hundred eighty-one".