1855075596556 has 144 divisors (see below), whose sum is σ = 4237340470272. Its totient is φ = 703562025600.

The previous prime is 1855075596553. The next prime is 1855075596641. The reversal of 1855075596556 is 6556955705581.

It is a super-2 number, since 2×1855075596556² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1855075596491 and 1855075596500.

It is not an unprimeable number, because it can be changed into a prime (1855075596553) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8341971 + ... + 8561461.

It is an arithmetic number, because the mean of its divisors is an integer number (29425975488).

Almost surely, 2^{1855075596556} 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 1855075596556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2118670235136).

1855075596556 is an abundant number, since it is smaller than the sum of its proper divisors (2382264873716).

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

1855075596556 is a wasteful number, since it uses less digits than its factorization.

1855075596556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219660 (or 219651 counting only the distinct ones).

The product of its (nonzero) digits is 283500000, while the sum is 67.

The spelling of 1855075596556 in words is "one trillion, eight hundred fifty-five billion, seventy-five million, five hundred ninety-six thousand, five hundred fifty-six".