80065278720 has 1296 divisors, whose sum is σ = 342966929760. Its totient is φ = 17167417344.

The previous prime is 80065278719. The next prime is 80065278721. The reversal of 80065278720 is 2787256008.

It is an interprime number because it is at equal distance from previous prime (80065278719) and next prime (80065278721).

It is a super-2 number, since 2×80065278720² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (80065278721) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1096784604 + ... + 1096784676.

Almost surely, 2^80065278720 is an apocalyptic number.

80065278720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80065278720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171483464880).

80065278720 is an abundant number, since it is smaller than the sum of its proper divisors (262901651040).

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

80065278720 is a wasteful number, since it uses less digits than its factorization.

80065278720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 80065278720 in words is "eighty billion, sixty-five million, two hundred seventy-eight thousand, seven hundred twenty".