855578109405 has 64 divisors (see below), whose sum is σ = 1464873062400. Its totient is φ = 425382160896.

The previous prime is 855578109403. The next prime is 855578109427. The reversal of 855578109405 is 504901875558.

It is not a de Polignac number, because 855578109405 - 2¹ = 855578109403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855578109403) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6716496 + ... + 6842694.

It is an arithmetic number, because the mean of its divisors is an integer number (22888641600).

Almost surely, 2^855578109405 is an apocalyptic number.

It is an amenable number.

855578109405 is a deficient number, since it is larger than the sum of its proper divisors (609294952995).

855578109405 is a wasteful number, since it uses less digits than its factorization.

855578109405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126730.

The product of its (nonzero) digits is 10080000, while the sum is 57.

The spelling of 855578109405 in words is "eight hundred fifty-five billion, five hundred seventy-eight million, one hundred nine thousand, four hundred five".