80464781 has 8 divisors (see below), whose sum is σ = 82018200. Its totient is φ = 78926400.

The previous prime is 80464771. The next prime is 80464793. The reversal of 80464781 is 18746408.

It can be written as a sum of positive squares in 4 ways, for example, as 38019556 + 42445225 = 6166^2 + 6515^2 .

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 80464781 - 2⁶ = 80464717 is a prime.

It is a super-2 number, since 2×80464781² = 12949161962755922, 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 (80464711) 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, 7355 + ... + 14663.

It is an arithmetic number, because the mean of its divisors is an integer number (10252275).

Almost surely, 2^80464781 is an apocalyptic number.

It is an amenable number.

80464781 is a deficient number, since it is larger than the sum of its proper divisors (1553419).

80464781 is a wasteful number, since it uses less digits than its factorization.

80464781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7519.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 80464781 is about 8970.2163296099. The cubic root of 80464781 is about 431.7197774742.

The spelling of 80464781 in words is "eighty million, four hundred sixty-four thousand, seven hundred eighty-one".