869358042764639 has 2 divisors, whose sum is σ = 869358042764640. Its totient is φ = 869358042764638.

The previous prime is 869358042764633. The next prime is 869358042764647. The reversal of 869358042764639 is 936467240853968.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 869358042764639 - 2¹⁶ = 869358042699103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869358042764633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434679021382319 + 434679021382320.

It is an arithmetic number, because the mean of its divisors is an integer number (434679021382320).

Almost surely, 2^{869358042764639} is an apocalyptic number.

869358042764639 is a deficient number, since it is larger than the sum of its proper divisors (1).

869358042764639 is an equidigital number, since it uses as much as digits as its factorization.

869358042764639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11287019520, while the sum is 80.

The spelling of 869358042764639 in words is "eight hundred sixty-nine trillion, three hundred fifty-eight billion, forty-two million, seven hundred sixty-four thousand, six hundred thirty-nine".