80980752521 has 4 divisors (see below), whose sum is σ = 82090077972. Its totient is φ = 79871427072.

The previous prime is 80980752439. The next prime is 80980752533. The reversal of 80980752521 is 12525708908.

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 68820176896 + 12160575625 = 262336^2 + 110275^2 .

It is a cyclic number.

It is not a de Polignac number, because 80980752521 - 2³⁰ = 79907010697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80980752551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554662616 + ... + 554662761.

It is an arithmetic number, because the mean of its divisors is an integer number (20522519493).

Almost surely, 2^80980752521 is an apocalyptic number.

It is an amenable number.

80980752521 is a deficient number, since it is larger than the sum of its proper divisors (1109325451).

80980752521 is a wasteful number, since it uses less digits than its factorization.

80980752521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109325450.

The product of its (nonzero) digits is 403200, while the sum is 47.

The spelling of 80980752521 in words is "eighty billion, nine hundred eighty million, seven hundred fifty-two thousand, five hundred twenty-one".