80207025381521 has 4 divisors (see below), whose sum is σ = 80287473753012. Its totient is φ = 80126577010032.

The previous prime is 80207025381517. The next prime is 80207025381523. The reversal of 80207025381521 is 12518352070208.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67664838546496 + 12542186835025 = 8225864^2 + 3541495^2 .

It is a cyclic number.

It is not a de Polignac number, because 80207025381521 - 2² = 80207025381517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80207025381523) 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 3 ways as a sum of consecutive naturals, for example, 40224184250 + ... + 40224186243.

It is an arithmetic number, because the mean of its divisors is an integer number (20071868438253).

Almost surely, 2^{80207025381521} is an apocalyptic number.

It is an amenable number.

80207025381521 is a deficient number, since it is larger than the sum of its proper divisors (80448371491).

80207025381521 is an equidigital number, since it uses as much as digits as its factorization.

80207025381521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80448371490.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 80207025381521 in words is "eighty trillion, two hundred seven billion, twenty-five million, three hundred eighty-one thousand, five hundred twenty-one".