86643561464551 has 32 divisors (see below), whose sum is σ = 110316627509760. Its totient is φ = 66188515284864.

The previous prime is 86643561464539. The next prime is 86643561464563. The reversal of 86643561464551 is 15546416534668.

It is an interprime number because it is at equal distance from previous prime (86643561464539) and next prime (86643561464563).

It is not a de Polignac number, because 86643561464551 - 2⁹ = 86643561464039 is a prime.

It is a super-2 number, since 2×86643561464551² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86643561464521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 473880916 + ... + 474063718.

It is an arithmetic number, because the mean of its divisors is an integer number (3447394609680).

Almost surely, 2^{86643561464551} is an apocalyptic number.

86643561464551 is a deficient number, since it is larger than the sum of its proper divisors (23673066045209).

86643561464551 is a wasteful number, since it uses less digits than its factorization.

86643561464551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362455.

The product of its digits is 248832000, while the sum is 64.

The spelling of 86643561464551 in words is "eighty-six trillion, six hundred forty-three billion, five hundred sixty-one million, four hundred sixty-four thousand, five hundred fifty-one".