80553780 has 36 divisors (see below), whose sum is σ = 244347012. Its totient is φ = 21480960.

The previous prime is 80553763. The next prime is 80553827. The reversal of 80553780 is 8735508.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 49617936 + 30935844 = 7044^2 + 5562^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×80553780² = 12977822944576800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 223581 + ... + 223940.

It is an arithmetic number, because the mean of its divisors is an integer number (6787417).

Almost surely, 2^80553780 is an apocalyptic number.

It is an amenable number.

80553780 is an abundant number, since it is smaller than the sum of its proper divisors (163793232).

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

80553780 is a wasteful number, since it uses less digits than its factorization.

80553780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447536 (or 447531 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 80553780 is about 8975.1757642956. The cubic root of 80553780 is about 431.8788883745.

The spelling of 80553780 in words is "eighty million, five hundred fifty-three thousand, seven hundred eighty".