87110571061 has 2 divisors, whose sum is σ = 87110571062. Its totient is φ = 87110571060.

The previous prime is 87110571007. The next prime is 87110571077. The reversal of 87110571061 is 16017501178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87110571025 + 36 = 295145^2 + 6^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87110571061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87110571061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87110571091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43555285530 + 43555285531.

It is an arithmetic number, because the mean of its divisors is an integer number (43555285531).

Almost surely, 2^87110571061 is an apocalyptic number.

It is an amenable number.

87110571061 is a deficient number, since it is larger than the sum of its proper divisors (1).

87110571061 is an equidigital number, since it uses as much as digits as its factorization.

87110571061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 37.

The spelling of 87110571061 in words is "eighty-seven billion, one hundred ten million, five hundred seventy-one thousand, sixty-one".