86818681387 has 2 divisors, whose sum is σ = 86818681388. Its totient is φ = 86818681386.

The previous prime is 86818681381. The next prime is 86818681421. The reversal of 86818681387 is 78318681868.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86818681387 - 2³ = 86818681379 is a prime.

It is not a weakly prime, because it can be changed into another prime (86818681381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43409340693 + 43409340694.

It is an arithmetic number, because the mean of its divisors is an integer number (43409340694).

Almost surely, 2^86818681387 is an apocalyptic number.

86818681387 is a deficient number, since it is larger than the sum of its proper divisors (1).

86818681387 is an equidigital number, since it uses as much as digits as its factorization.

86818681387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24772608, while the sum is 64.

The spelling of 86818681387 in words is "eighty-six billion, eight hundred eighteen million, six hundred eighty-one thousand, three hundred eighty-seven".