87705941563 has 2 divisors, whose sum is σ = 87705941564. Its totient is φ = 87705941562.

The previous prime is 87705941507. The next prime is 87705941569. The reversal of 87705941563 is 36514950778.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87705941563 is a prime.

It is not a weakly prime, because it can be changed into another prime (87705941569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43852970781 + 43852970782.

It is an arithmetic number, because the mean of its divisors is an integer number (43852970782).

Almost surely, 2^87705941563 is an apocalyptic number.

87705941563 is a deficient number, since it is larger than the sum of its proper divisors (1).

87705941563 is an equidigital number, since it uses as much as digits as its factorization.

87705941563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6350400, while the sum is 55.

The spelling of 87705941563 in words is "eighty-seven billion, seven hundred five million, nine hundred forty-one thousand, five hundred sixty-three".