87180618643 has 2 divisors, whose sum is σ = 87180618644. Its totient is φ = 87180618642.

The previous prime is 87180618599. The next prime is 87180618671. The reversal of 87180618643 is 34681608178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87180618643 - 2⁹ = 87180618131 is a prime.

It is a super-2 number, since 2×87180618643² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87180418643) 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, 43590309321 + 43590309322.

It is an arithmetic number, because the mean of its divisors is an integer number (43590309322).

Almost surely, 2^87180618643 is an apocalyptic number.

87180618643 is a deficient number, since it is larger than the sum of its proper divisors (1).

87180618643 is an equidigital number, since it uses as much as digits as its factorization.

87180618643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1548288, while the sum is 52.

The spelling of 87180618643 in words is "eighty-seven billion, one hundred eighty million, six hundred eighteen thousand, six hundred forty-three".