86233778381 has 2 divisors, whose sum is σ = 86233778382. Its totient is φ = 86233778380.

The previous prime is 86233778363. The next prime is 86233778447. The reversal of 86233778381 is 18387733268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86230322500 + 3455881 = 293650^2 + 1859^2 .

It is a cyclic number.

It is not a de Polignac number, because 86233778381 - 2²⁶ = 86166669517 is a prime.

It is a super-2 number, since 2×86233778381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86233778311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43116889190 + 43116889191.

It is an arithmetic number, because the mean of its divisors is an integer number (43116889191).

Almost surely, 2^86233778381 is an apocalyptic number.

It is an amenable number.

86233778381 is a deficient number, since it is larger than the sum of its proper divisors (1).

86233778381 is an equidigital number, since it uses as much as digits as its factorization.

86233778381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8128512, while the sum is 56.

The spelling of 86233778381 in words is "eighty-six billion, two hundred thirty-three million, seven hundred seventy-eight thousand, three hundred eighty-one".