86678501996641 has 3 divisors (see below), whose sum is σ = 86678511306771. Its totient is φ = 86678492686512.

The previous prime is 86678501996629. The next prime is 86678501996659. The reversal of 86678501996641 is 14669910587668.

The square root of 86678501996641 is 9310129.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 47776836102241 + 38901665894400 = 6912079^2 + 6237120^2 .

It is not a de Polignac number, because 86678501996641 - 2³⁵ = 86644142258273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86678501994641) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4655065 + ... + 13965193.

It is an arithmetic number, because the mean of its divisors is an integer number (28892837102257).

Almost surely, 2^{86678501996641} is an apocalyptic number.

86678501996641 is the 9310129-th square number.

86678501996641 is the 4655065-th centered octagonal number.

It is an amenable number.

86678501996641 is a deficient number, since it is larger than the sum of its proper divisors (9310130).

86678501996641 is an frugal number, since it uses more digits than its factorization.

86678501996641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18620258 (or 9310129 counting only the distinct ones).

The product of its (nonzero) digits is 940584960, while the sum is 76.

The spelling of 86678501996641 in words is "eighty-six trillion, six hundred seventy-eight billion, five hundred one million, nine hundred ninety-six thousand, six hundred forty-one".