80555136 has 128 divisors (see below), whose sum is σ = 230193600. Its totient is φ = 24883200.

The previous prime is 80555107. The next prime is 80555141. The reversal of 80555136 is 63155508.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 80555097 and 80555106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 444966 + ... + 445146.

Almost surely, 2^80555136 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 80555136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115096800).

80555136 is an abundant number, since it is smaller than the sum of its proper divisors (149638464).

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

80555136 is a wasteful number, since it uses less digits than its factorization.

80555136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 80555136 is about 8975.2513056738. The cubic root of 80555136 is about 431.8813117017.

The spelling of 80555136 in words is "eighty million, five hundred fifty-five thousand, one hundred thirty-six".