855623079529 has 2 divisors, whose sum is σ = 855623079530. Its totient is φ = 855623079528.

The previous prime is 855623079463. The next prime is 855623079569. The reversal of 855623079529 is 925970326558.

855623079529 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 489507323904 + 366115755625 = 699648^2 + 605075^2 .

It is a cyclic number.

It is not a de Polignac number, because 855623079529 - 2³⁵ = 821263341161 is a prime.

It is not a weakly prime, because it can be changed into another prime (855623079569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427811539764 + 427811539765.

It is an arithmetic number, because the mean of its divisors is an integer number (427811539765).

Almost surely, 2^855623079529 is an apocalyptic number.

It is an amenable number.

855623079529 is a deficient number, since it is larger than the sum of its proper divisors (1).

855623079529 is an equidigital number, since it uses as much as digits as its factorization.

855623079529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824000, while the sum is 61.

The spelling of 855623079529 in words is "eight hundred fifty-five billion, six hundred twenty-three million, seventy-nine thousand, five hundred twenty-nine".