2158091756080 has 80 divisors (see below), whose sum is σ = 5406167108160. Its totient is φ = 796444959744.

The previous prime is 2158091756063. The next prime is 2158091756081. The reversal of 2158091756080 is 806571908512.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (2158091756081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1629741 + ... + 2640499.

It is an arithmetic number, because the mean of its divisors is an integer number (67577088852).

Almost surely, 2^{2158091756080} is an apocalyptic number.

2158091756080 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 2158091756080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2703083554080).

2158091756080 is an abundant number, since it is smaller than the sum of its proper divisors (3248075352080).

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

2158091756080 is a wasteful number, since it uses less digits than its factorization.

2158091756080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012838 (or 1012832 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 52.

The spelling of 2158091756080 in words is "two trillion, one hundred fifty-eight billion, ninety-one million, seven hundred fifty-six thousand, eighty".