80369820040 has 32 divisors (see below), whose sum is σ = 186665391360. Its totient is φ = 31110897600.

The previous prime is 80369820029. The next prime is 80369820043. The reversal of 80369820040 is 4002896308.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 80369819975 and 80369820002.

It is not an unprimeable number, because it can be changed into a prime (80369820043) 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, 32405946 + ... + 32408425.

It is an arithmetic number, because the mean of its divisors is an integer number (5833293480).

Almost surely, 2^80369820040 is an apocalyptic number.

It is an amenable number.

80369820040 is an abundant number, since it is smaller than the sum of its proper divisors (106295571320).

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

80369820040 is a wasteful number, since it uses less digits than its factorization.

80369820040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64814413 (or 64814409 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 80369820040 in words is "eighty billion, three hundred sixty-nine million, eight hundred twenty thousand, forty".