80557530 has 128 divisors (see below), whose sum is σ = 216760320. Its totient is φ = 19077120.

The previous prime is 80557501. The next prime is 80557531. The reversal of 80557530 is 3575508.

It is a junction number, because it is equal to n+sod(n) for n = 80557491 and 80557500.

It is not an unprimeable number, because it can be changed into a prime (80557531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 830442 + ... + 830538.

It is an arithmetic number, because the mean of its divisors is an integer number (1693440).

Almost surely, 2^80557530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80557530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108380160).

80557530 is an abundant number, since it is smaller than the sum of its proper divisors (136202790).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80557530 is a wasteful number, since it uses less digits than its factorization.

80557530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 80557530 is about 8975.3846714222. The cubic root of 80557530 is about 431.8855899872.

The spelling of 80557530 in words is "eighty million, five hundred fifty-seven thousand, five hundred thirty".