80657379577 has 2 divisors, whose sum is σ = 80657379578. Its totient is φ = 80657379576.

The previous prime is 80657379571. The next prime is 80657379653. The reversal of 80657379577 is 77597375608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72143811216 + 8513568361 = 268596^2 + 92269^2 .

It is a cyclic number.

It is not a de Polignac number, because 80657379577 - 2⁷ = 80657379449 is a prime.

It is a super-2 number, since 2×80657379577² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80657379571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40328689788 + 40328689789.

It is an arithmetic number, because the mean of its divisors is an integer number (40328689789).

Almost surely, 2^80657379577 is an apocalyptic number.

It is an amenable number.

80657379577 is a deficient number, since it is larger than the sum of its proper divisors (1).

80657379577 is an equidigital number, since it uses as much as digits as its factorization.

80657379577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77792400, while the sum is 64.

The spelling of 80657379577 in words is "eighty billion, six hundred fifty-seven million, three hundred seventy-nine thousand, five hundred seventy-seven".