86571034787777 has 4 divisors (see below), whose sum is σ = 86892860196180. Its totient is φ = 86249209379376.

The previous prime is 86571034787759. The next prime is 86571034787807. The reversal of 86571034787777 is 77778743017568.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6195076198081 + 80375958589696 = 2488991^2 + 8965264^2 .

It is a cyclic number.

It is not a de Polignac number, because 86571034787777 - 2²² = 86571030593473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86571034787698 and 86571034787707.

It is not an unprimeable number, because it can be changed into a prime (86571034787707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160912703798 + ... + 160912704335.

It is an arithmetic number, because the mean of its divisors is an integer number (21723215049045).

Almost surely, 2^{86571034787777} is an apocalyptic number.

It is an amenable number.

86571034787777 is a deficient number, since it is larger than the sum of its proper divisors (321825408403).

86571034787777 is a wasteful number, since it uses less digits than its factorization.

86571034787777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321825408402.

The product of its (nonzero) digits is 2710632960, while the sum is 77.

The spelling of 86571034787777 in words is "eighty-six trillion, five hundred seventy-one billion, thirty-four million, seven hundred eighty-seven thousand, seven hundred seventy-seven".