855973974380 has 144 divisors (see below), whose sum is σ = 2159417647296. Its totient is φ = 283965212160.

The previous prime is 855973974329. The next prime is 855973974397. The reversal of 855973974380 is 83479379558.

It is a self number, because there is not a number n which added to its sum of digits gives 855973974380.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6497849 + ... + 6628271.

It is an arithmetic number, because the mean of its divisors is an integer number (14995955884).

Almost surely, 2^855973974380 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 855973974380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1079708823648).

855973974380 is an abundant number, since it is smaller than the sum of its proper divisors (1303443672916).

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

855973974380 is a wasteful number, since it uses less digits than its factorization.

855973974380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130664 (or 130655 counting only the distinct ones).

The product of its (nonzero) digits is 228614400, while the sum is 68.

The spelling of 855973974380 in words is "eight hundred fifty-five billion, nine hundred seventy-three million, nine hundred seventy-four thousand, three hundred eighty".