855178009406 has 16 divisors (see below), whose sum is σ = 1473615405024. Its totient is φ = 364605871104.

The previous prime is 855178009397. The next prime is 855178009417. The reversal of 855178009406 is 604900871558.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158246375 + ... + 158251778.

It is an arithmetic number, because the mean of its divisors is an integer number (92100962814).

Almost surely, 2^855178009406 is an apocalyptic number.

855178009406 is a deficient number, since it is larger than the sum of its proper divisors (618437395618).

855178009406 is a wasteful number, since it uses less digits than its factorization.

855178009406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316498355.

The product of its (nonzero) digits is 2419200, while the sum is 53.

The spelling of 855178009406 in words is "eight hundred fifty-five billion, one hundred seventy-eight million, nine thousand, four hundred six".