86647018321 has 2 divisors, whose sum is σ = 86647018322. Its totient is φ = 86647018320.

The previous prime is 86647018309. The next prime is 86647018373. The reversal of 86647018321 is 12381074668.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43748323921 + 42898694400 = 209161^2 + 207120^2 .

It is a cyclic number.

It is not a de Polignac number, because 86647018321 - 2³¹ = 84499534673 is a prime.

It is not a weakly prime, because it can be changed into another prime (86647018121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43323509160 + 43323509161.

It is an arithmetic number, because the mean of its divisors is an integer number (43323509161).

Almost surely, 2^86647018321 is an apocalyptic number.

It is an amenable number.

86647018321 is a deficient number, since it is larger than the sum of its proper divisors (1).

86647018321 is an equidigital number, since it uses as much as digits as its factorization.

86647018321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 86647018321 in words is "eighty-six billion, six hundred forty-seven million, eighteen thousand, three hundred twenty-one".