855512079 has 16 divisors (see below), whose sum is σ = 1160835072. Its totient is φ = 560311488.

The previous prime is 855512059. The next prime is 855512089. The reversal of 855512079 is 970215558.

It is a de Polignac number, because none of the positive numbers 2^k-855512079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 855512079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855512059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71427 + ... + 82539.

It is an arithmetic number, because the mean of its divisors is an integer number (72552192).

Almost surely, 2^855512079 is an apocalyptic number.

855512079 is a deficient number, since it is larger than the sum of its proper divisors (305322993).

855512079 is a wasteful number, since it uses less digits than its factorization.

855512079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11566.

The product of its (nonzero) digits is 126000, while the sum is 42.

The square root of 855512079 is about 29249.1380898651. The cubic root of 855512079 is about 949.3114415901.

The spelling of 855512079 in words is "eight hundred fifty-five million, five hundred twelve thousand, seventy-nine".