87081557071 has 2 divisors, whose sum is σ = 87081557072. Its totient is φ = 87081557070.

The previous prime is 87081557063. The next prime is 87081557119. The reversal of 87081557071 is 17075518078.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87081557071 - 2³ = 87081557063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87081587071) 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 as a sum of consecutive naturals, namely, 43540778535 + 43540778536.

It is an arithmetic number, because the mean of its divisors is an integer number (43540778536).

Almost surely, 2^87081557071 is an apocalyptic number.

87081557071 is a deficient number, since it is larger than the sum of its proper divisors (1).

87081557071 is an equidigital number, since it uses as much as digits as its factorization.

87081557071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 548800, while the sum is 49.

The spelling of 87081557071 in words is "eighty-seven billion, eighty-one million, five hundred fifty-seven thousand, seventy-one".