80320781450 has 768 divisors, whose sum is σ = 221745807360. Its totient is φ = 20901888000.

The previous prime is 80320781449. The next prime is 80320781461. The reversal of 80320781450 is 5418702308.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 1867925129 + ... + 1867925171.

It is an arithmetic number, because the mean of its divisors is an integer number (288731520).

Almost surely, 2^80320781450 is an apocalyptic number.

80320781450 is an abundant number, since it is smaller than the sum of its proper divisors (141425025910).

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

80320781450 is a wasteful number, since it uses less digits than its factorization.

80320781450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The spelling of 80320781450 in words is "eighty billion, three hundred twenty million, seven hundred eighty-one thousand, four hundred fifty".