86378685137 has 2 divisors, whose sum is σ = 86378685138. Its totient is φ = 86378685136.

The previous prime is 86378685097. The next prime is 86378685139. The reversal of 86378685137 is 73158687368.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62242266256 + 24136418881 = 249484^2 + 155359^2 .

It is a cyclic number.

It is not a de Polignac number, because 86378685137 - 2¹² = 86378681041 is a prime.

It is a super-2 number, since 2×86378685137² (a number of 23 digits) contains 22 as substring.

Together with 86378685139, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86378685137.

It is not a weakly prime, because it can be changed into another prime (86378685139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43189342568 + 43189342569.

It is an arithmetic number, because the mean of its divisors is an integer number (43189342569).

Almost surely, 2^86378685137 is an apocalyptic number.

It is an amenable number.

86378685137 is a deficient number, since it is larger than the sum of its proper divisors (1).

86378685137 is an equidigital number, since it uses as much as digits as its factorization.

86378685137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40642560, while the sum is 62.

The spelling of 86378685137 in words is "eighty-six billion, three hundred seventy-eight million, six hundred eighty-five thousand, one hundred thirty-seven".