2155841752680 has 896 divisors, whose sum is σ = 9096602849280. Its totient is φ = 446514716160.

The previous prime is 2155841752541. The next prime is 2155841752681. The reversal of 2155841752680 is 862571485512.

2155841752680 is a `hidden beast` number, since 2 + 1 + 5 + 584 + 1 + 7 + 52 + 6 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (2155841752681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 779124657 + ... + 779127423.

Almost surely, 2^{2155841752680} is an apocalyptic number.

2155841752680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2155841752680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4548301424640).

2155841752680 is an abundant number, since it is smaller than the sum of its proper divisors (6940761096600).

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

2155841752680 is a wasteful number, since it uses less digits than its factorization.

2155841752680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3161 (or 3142 counting only the distinct ones).

The product of its (nonzero) digits is 5376000, while the sum is 54.

The spelling of 2155841752680 in words is "two trillion, one hundred fifty-five billion, eight hundred forty-one million, seven hundred fifty-two thousand, six hundred eighty".