86541587149609 has 2 divisors, whose sum is σ = 86541587149610. Its totient is φ = 86541587149608.

The previous prime is 86541587149579. The next prime is 86541587149649. The reversal of 86541587149609 is 90694178514568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53669103846400 + 32872483303209 = 7325920^2 + 5733453^2 .

It is a cyclic number.

It is not a de Polignac number, because 86541587149609 - 2²⁷ = 86541452931881 is a prime.

It is not a weakly prime, because it can be changed into another prime (86541587149649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43270793574804 + 43270793574805.

It is an arithmetic number, because the mean of its divisors is an integer number (43270793574805).

Almost surely, 2^{86541587149609} is an apocalyptic number.

It is an amenable number.

86541587149609 is a deficient number, since it is larger than the sum of its proper divisors (1).

86541587149609 is an equidigital number, since it uses as much as digits as its factorization.

86541587149609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 522547200, while the sum is 73.

The spelling of 86541587149609 in words is "eighty-six trillion, five hundred forty-one billion, five hundred eighty-seven million, one hundred forty-nine thousand, six hundred nine".