80155620 has 72 divisors (see below), whose sum is σ = 245601720. Its totient is φ = 21158400.

The previous prime is 80155619. The next prime is 80155627. The reversal of 80155620 is 2655108.

It can be written as a sum of positive squares in 4 ways, for example, as 9998244 + 70157376 = 3162^2 + 8376^2 .

It is not an unprimeable number, because it can be changed into a prime (80155627) 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 23 ways as a sum of consecutive naturals, for example, 15976 + ... + 20384.

It is an arithmetic number, because the mean of its divisors is an integer number (3411135).

Almost surely, 2^80155620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80155620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122800860).

80155620 is an abundant number, since it is smaller than the sum of its proper divisors (165446100).

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

80155620 is a wasteful number, since it uses less digits than its factorization.

80155620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4525 (or 4520 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 80155620 is about 8952.9671059376. The cubic root of 80155620 is about 431.1661513101.

The spelling of 80155620 in words is "eighty million, one hundred fifty-five thousand, six hundred twenty".