864808537787 has 2 divisors, whose sum is σ = 864808537788. Its totient is φ = 864808537786.

The previous prime is 864808537783. The next prime is 864808537849. The reversal of 864808537787 is 787735808468.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 864808537787 - 2² = 864808537783 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 864808537787.

It is not a weakly prime, because it can be changed into another prime (864808537783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432404268893 + 432404268894.

It is an arithmetic number, because the mean of its divisors is an integer number (432404268894).

Almost surely, 2^864808537787 is an apocalyptic number.

864808537787 is a deficient number, since it is larger than the sum of its proper divisors (1).

864808537787 is an equidigital number, since it uses as much as digits as its factorization.

864808537787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 505774080, while the sum is 71.

The spelling of 864808537787 in words is "eight hundred sixty-four billion, eight hundred eight million, five hundred thirty-seven thousand, seven hundred eighty-seven".