2158846663680 has 352 divisors, whose sum is σ = 8768176788480. Its totient is φ = 493450444800.

The previous prime is 2158846663669. The next prime is 2158846663697. The reversal of 2158846663680 is 863666488512.

It is a happy number.

It is a super-2 number, since 2×2158846663680² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147796 + ... + 2083155.

Almost surely, 2^{2158846663680} is an apocalyptic number.

2158846663680 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 2158846663680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4384088394240).

2158846663680 is an abundant number, since it is smaller than the sum of its proper divisors (6609330124800).

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

2158846663680 is a wasteful number, since it uses less digits than its factorization.

2158846663680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230992 (or 2230968 counting only the distinct ones).

The product of its (nonzero) digits is 79626240, while the sum is 63.

The spelling of 2158846663680 in words is "two trillion, one hundred fifty-eight billion, eight hundred forty-six million, six hundred sixty-three thousand, six hundred eighty".