6855438156 has 192 divisors, whose sum is σ = 19752026112. Its totient is φ = 1806271488.

The previous prime is 6855438133. The next prime is 6855438179. The reversal of 6855438156 is 6518345586.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6855438133) and next prime (6855438179).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 6855438099 and 6855438108.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18679485 + ... + 18679851.

It is an arithmetic number, because the mean of its divisors is an integer number (102875136).

Almost surely, 2^6855438156 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 6855438156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9876013056).

6855438156 is an abundant number, since it is smaller than the sum of its proper divisors (12896587956).

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

6855438156 is a wasteful number, since it uses less digits than its factorization.

6855438156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628 (or 626 counting only the distinct ones).

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

The square root of 6855438156 is about 82797.5733702383. The cubic root of 6855438156 is about 1899.6710562579.

The spelling of 6855438156 in words is "six billion, eight hundred fifty-five million, four hundred thirty-eight thousand, one hundred fifty-six".