862783778452 has 6 divisors (see below), whose sum is σ = 1509871612298. Its totient is φ = 431391889224.

The previous prime is 862783778401. The next prime is 862783778453. The reversal of 862783778452 is 254877387268.

It can be written as a sum of positive squares in only one way, i.e., 568494888196 + 294288890256 = 753986^2 + 542484^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (862783778453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107847972303 + ... + 107847972310.

Almost surely, 2^862783778452 is an apocalyptic number.

It is an amenable number.

862783778452 is a deficient number, since it is larger than the sum of its proper divisors (647087833846).

862783778452 is a wasteful number, since it uses less digits than its factorization.

862783778452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215695944617 (or 215695944615 counting only the distinct ones).

The product of its digits is 252887040, while the sum is 67.

The spelling of 862783778452 in words is "eight hundred sixty-two billion, seven hundred eighty-three million, seven hundred seventy-eight thousand, four hundred fifty-two".