80780355 has 32 divisors (see below), whose sum is σ = 144529920. Its totient is φ = 42806880.

The previous prime is 80780353. The next prime is 80780377. The reversal of 80780355 is 55308708.

It is a happy number.

It is not a de Polignac number, because 80780355 - 2¹ = 80780353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80780353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20170 + ... + 23840.

It is an arithmetic number, because the mean of its divisors is an integer number (4516560).

Almost surely, 2^80780355 is an apocalyptic number.

80780355 is a deficient number, since it is larger than the sum of its proper divisors (63749565).

80780355 is a wasteful number, since it uses less digits than its factorization.

80780355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3848 (or 3842 counting only the distinct ones).

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

The square root of 80780355 is about 8987.7892164870. The cubic root of 80780355 is about 432.2834270483.

The spelling of 80780355 in words is "eighty million, seven hundred eighty thousand, three hundred fifty-five".