4156556838 has 64 divisors (see below), whose sum is σ = 9834774528. Its totient is φ = 1146337920.

The previous prime is 4156556837. The next prime is 4156556843. The reversal of 4156556838 is 8386556514.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4156556837) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186828 + ... + 207888.

It is an arithmetic number, because the mean of its divisors is an integer number (153668352).

Almost surely, 2^4156556838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4156556838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4917387264).

4156556838 is an abundant number, since it is smaller than the sum of its proper divisors (5678217690).

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

4156556838 is a wasteful number, since it uses less digits than its factorization.

4156556838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21237.

The product of its digits is 3456000, while the sum is 51.

The square root of 4156556838 is about 64471.3644806747. The cubic root of 4156556838 is about 1607.8464626861.

The spelling of 4156556838 in words is "four billion, one hundred fifty-six million, five hundred fifty-six thousand, eight hundred thirty-eight".