80128567 has 8 divisors (see below), whose sum is σ = 84503600. Its totient is φ = 75769344.

The previous prime is 80128553. The next prime is 80128571. The reversal of 80128567 is 76582108.

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

It is a 9-Lehmer number, since φ(80128567) divides (80128567-1)⁹.

It is a cyclic number.

It is not a de Polignac number, because 80128567 - 2⁷ = 80128439 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 (80128507) 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, 7309 + ... + 14617.

It is an arithmetic number, because the mean of its divisors is an integer number (10562950).

Almost surely, 2^80128567 is an apocalyptic number.

80128567 is the 7309-th pentagonal number.

80128567 is a deficient number, since it is larger than the sum of its proper divisors (4375033).

80128567 is a wasteful number, since it uses less digits than its factorization.

80128567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7905.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 80128567 is about 8951.4561385285. The cubic root of 80128567 is about 431.1176388024.

The spelling of 80128567 in words is "eighty million, one hundred twenty-eight thousand, five hundred sixty-seven".