862783778653 has 2 divisors, whose sum is σ = 862783778654. Its totient is φ = 862783778652.

The previous prime is 862783778651. The next prime is 862783778671. The reversal of 862783778653 is 356877387268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 839545215289 + 23238563364 = 916267^2 + 152442^2 .

It is a cyclic number.

It is not a de Polignac number, because 862783778653 - 2¹ = 862783778651 is a prime.

Together with 862783778651, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (862783778651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431391889326 + 431391889327.

It is an arithmetic number, because the mean of its divisors is an integer number (431391889327).

Almost surely, 2^862783778653 is an apocalyptic number.

It is an amenable number.

862783778653 is a deficient number, since it is larger than the sum of its proper divisors (1).

862783778653 is an equidigital number, since it uses as much as digits as its factorization.

862783778653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 568995840, while the sum is 70.

The spelling of 862783778653 in words is "eight hundred sixty-two billion, seven hundred eighty-three million, seven hundred seventy-eight thousand, six hundred fifty-three".