6155128982646 has 128 divisors (see below), whose sum is σ = 15810840576000. Its totient is φ = 1738504829952.

The previous prime is 6155128982641. The next prime is 6155128982657. The reversal of 6155128982646 is 6462898215516.

6155128982646 is a `hidden beast` number, since 6 + 1 + 5 + 512 + 8 + 98 + 26 + 4 + 6 = 666.

It is a super-2 number, since 2×6155128982646² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6155128982641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 204494670 + ... + 204524766.

It is an arithmetic number, because the mean of its divisors is an integer number (123522192000).

Almost surely, 2^{6155128982646} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6155128982646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7905420288000).

6155128982646 is an abundant number, since it is smaller than the sum of its proper divisors (9655711593354).

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

6155128982646 is a wasteful number, since it uses less digits than its factorization.

6155128982646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36283 (or 36277 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 63.

The spelling of 6155128982646 in words is "six trillion, one hundred fifty-five billion, one hundred twenty-eight million, nine hundred eighty-two thousand, six hundred forty-six".