86188655557 has 2 divisors, whose sum is σ = 86188655558. Its totient is φ = 86188655556.

The previous prime is 86188655549. The next prime is 86188655563. The reversal of 86188655557 is 75555688168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85770493956 + 418161601 = 292866^2 + 20449^2 .

It is a cyclic number.

It is not a de Polignac number, because 86188655557 - 2³ = 86188655549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86188655587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43094327778 + 43094327779.

It is an arithmetic number, because the mean of its divisors is an integer number (43094327779).

Almost surely, 2^86188655557 is an apocalyptic number.

It is an amenable number.

86188655557 is a deficient number, since it is larger than the sum of its proper divisors (1).

86188655557 is an equidigital number, since it uses as much as digits as its factorization.

86188655557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640000, while the sum is 64.

The spelling of 86188655557 in words is "eighty-six billion, one hundred eighty-eight million, six hundred fifty-five thousand, five hundred fifty-seven".