2155793856 has 56 divisors (see below), whose sum is σ = 5708227344. Its totient is φ = 718049280.

The previous prime is 2155793833. The next prime is 2155793881. The reversal of 2155793856 is 6583975512.

It is a happy number.

It is a super-3 number, since 3×2155793856³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2155793799 and 2155793808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306216 + ... + 313176.

Almost surely, 2^2155793856 is an apocalyptic number.

It is an amenable number.

2155793856 is an abundant number, since it is smaller than the sum of its proper divisors (3552433488).

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

2155793856 is a wasteful number, since it uses less digits than its factorization.

2155793856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8589 (or 8579 counting only the distinct ones).

The product of its digits is 2268000, while the sum is 51.

The square root of 2155793856 is about 46430.5271992468. The cubic root of 2155793856 is about 1291.8212074508.

The spelling of 2155793856 in words is "two billion, one hundred fifty-five million, seven hundred ninety-three thousand, eight hundred fifty-six".