80120545577 has 2 divisors, whose sum is σ = 80120545578. Its totient is φ = 80120545576.

The previous prime is 80120545541. The next prime is 80120545597. The reversal of 80120545577 is 77554502108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45069591616 + 35050953961 = 212296^2 + 187219^2 .

It is a cyclic number.

It is not a de Polignac number, because 80120545577 - 2¹² = 80120541481 is a prime.

It is a super-4 number, since 4×80120545577⁴ (a number of 45 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (80120545597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40060272788 + 40060272789.

It is an arithmetic number, because the mean of its divisors is an integer number (40060272789).

Almost surely, 2^80120545577 is an apocalyptic number.

It is an amenable number.

80120545577 is a deficient number, since it is larger than the sum of its proper divisors (1).

80120545577 is an equidigital number, since it uses as much as digits as its factorization.

80120545577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392000, while the sum is 44.

The spelling of 80120545577 in words is "eighty billion, one hundred twenty million, five hundred forty-five thousand, five hundred seventy-seven".