2143971288780 has 96 divisors (see below), whose sum is σ = 6109171891200. Its totient is φ = 561639126528.

The previous prime is 2143971288761. The next prime is 2143971288787. The reversal of 2143971288780 is 878821793412.

It is a super-2 number, since 2×2143971288780² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (2143971288787) 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 31 ways as a sum of consecutive naturals, for example, 4824616 + ... + 5250224.

It is an arithmetic number, because the mean of its divisors is an integer number (63637207200).

Almost surely, 2^{2143971288780} is an apocalyptic number.

2143971288780 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 2143971288780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3054585945600).

2143971288780 is an abundant number, since it is smaller than the sum of its proper divisors (3965200602420).

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

2143971288780 is a wasteful number, since it uses less digits than its factorization.

2143971288780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427103 (or 427101 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 60.

The spelling of 2143971288780 in words is "two trillion, one hundred forty-three billion, nine hundred seventy-one million, two hundred eighty-eight thousand, seven hundred eighty".