864856254029 has 2 divisors, whose sum is σ = 864856254030. Its totient is φ = 864856254028.

The previous prime is 864856253957. The next prime is 864856254103. The reversal of 864856254029 is 920452658468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 788851277929 + 76004976100 = 888173^2 + 275690^2 .

It is a cyclic number.

It is not a de Polignac number, because 864856254029 - 2⁸ = 864856253773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864859254029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432428127014 + 432428127015.

It is an arithmetic number, because the mean of its divisors is an integer number (432428127015).

Almost surely, 2^864856254029 is an apocalyptic number.

It is an amenable number.

864856254029 is a deficient number, since it is larger than the sum of its proper divisors (1).

864856254029 is an equidigital number, since it uses as much as digits as its factorization.

864856254029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33177600, while the sum is 59.

The spelling of 864856254029 in words is "eight hundred sixty-four billion, eight hundred fifty-six million, two hundred fifty-four thousand, twenty-nine".