855790351656 has 128 divisors (see below), whose sum is σ = 2227834920960. Its totient is φ = 273648211200.

The previous prime is 855790351649. The next prime is 855790351679. The reversal of 855790351656 is 656153097558.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 855790351656.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97167205 + ... + 97176011.

It is an arithmetic number, because the mean of its divisors is an integer number (17404960320).

Almost surely, 2^855790351656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 855790351656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1113917460480).

855790351656 is an abundant number, since it is smaller than the sum of its proper divisors (1372044569304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

855790351656 is a wasteful number, since it uses less digits than its factorization.

855790351656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9975 (or 9971 counting only the distinct ones).

The product of its (nonzero) digits is 34020000, while the sum is 60.

The spelling of 855790351656 in words is "eight hundred fifty-five billion, seven hundred ninety million, three hundred fifty-one thousand, six hundred fifty-six".