80720357530 has 32 divisors (see below), whose sum is σ = 154060263360. Its totient is φ = 30365481600.

The previous prime is 80720357513. The next prime is 80720357533. The reversal of 80720357530 is 3575302708.

It is a super-3 number, since 3×80720357530³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (80720357533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1524496 + ... + 1576555.

It is an arithmetic number, because the mean of its divisors is an integer number (4814383230).

Almost surely, 2^80720357530 is an apocalyptic number.

80720357530 is a deficient number, since it is larger than the sum of its proper divisors (73339905830).

80720357530 is a wasteful number, since it uses less digits than its factorization.

80720357530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3101214.

The product of its (nonzero) digits is 176400, while the sum is 40.

The spelling of 80720357530 in words is "eighty billion, seven hundred twenty million, three hundred fifty-seven thousand, five hundred thirty".