80557505 has 16 divisors (see below), whose sum is σ = 114289920. Its totient is φ = 53333952.

The previous prime is 80557501. The next prime is 80557531. The reversal of 80557505 is 50575508.

It is not a de Polignac number, because 80557505 - 2² = 80557501 is a prime.

It is a super-2 number, since 2×80557505² = 12979023223650050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (80557501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38669 + ... + 40698.

It is an arithmetic number, because the mean of its divisors is an integer number (7143120).

Almost surely, 2^80557505 is an apocalyptic number.

It is an amenable number.

80557505 is a deficient number, since it is larger than the sum of its proper divisors (33732415).

80557505 is a wasteful number, since it uses less digits than its factorization.

80557505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79408.

The product of its (nonzero) digits is 35000, while the sum is 35.

The square root of 80557505 is about 8975.3832787241. The cubic root of 80557505 is about 431.8855453105.

The spelling of 80557505 in words is "eighty million, five hundred fifty-seven thousand, five hundred five".