855656755920 has 160 divisors (see below), whose sum is σ = 2997216201600. Its totient is φ = 224307726336.

The previous prime is 855656755909. The next prime is 855656755931. The reversal of 855656755920 is 29557656558.

855656755920 is a `hidden beast` number, since 8 + 5 + 5 + 6 + 56 + 7 + 559 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (855656755909) and next prime (855656755931).

It is a congruent number.

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, 3229657 + ... + 3484536.

It is an arithmetic number, because the mean of its divisors is an integer number (18732601260).

Almost surely, 2^855656755920 is an apocalyptic number.

855656755920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

855656755920 is an abundant number, since it is smaller than the sum of its proper divisors (2141559445680).

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

855656755920 is a wasteful number, since it uses less digits than its factorization.

855656755920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6714274 (or 6714262 counting only the distinct ones).

The product of its (nonzero) digits is 113400000, while the sum is 63.

The spelling of 855656755920 in words is "eight hundred fifty-five billion, six hundred fifty-six million, seven hundred fifty-five thousand, nine hundred twenty".