855799747670 has 32 divisors (see below), whose sum is σ = 1808083487808. Its totient is φ = 285486864768.

The previous prime is 855799747661. The next prime is 855799747679. The reversal of 855799747670 is 76747997558.

It is an interprime number because it is at equal distance from previous prime (855799747661) and next prime (855799747679).

It is a super-2 number, since 2×855799747670² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (74).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855799747679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165209717 + ... + 165214896.

It is an arithmetic number, because the mean of its divisors is an integer number (56502608994).

Almost surely, 2^855799747670 is an apocalyptic number.

855799747670 is an abundant number, since it is smaller than the sum of its proper divisors (952283740138).

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

855799747670 is a wasteful number, since it uses less digits than its factorization.

855799747670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330424664.

The product of its (nonzero) digits is 933508800, while the sum is 74.

The spelling of 855799747670 in words is "eight hundred fifty-five billion, seven hundred ninety-nine million, seven hundred forty-seven thousand, six hundred seventy".