2158319450884 has 27 divisors (see below), whose sum is σ = 3882096249087. Its totient is φ = 1049940357984.

The previous prime is 2158319450857. The next prime is 2158319450891. The reversal of 2158319450884 is 4880549138512.

The square root of 2158319450884 is 1469122.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 15257684484 + 2143061766400 = 123522^2 + 1463920^2 .

It is a super-2 number, since 2×2158319450884² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 108705102 + ... + 108724954.

Almost surely, 2^{2158319450884} is an apocalyptic number.

2158319450884 is the 1469122-nd square number.

It is an amenable number.

2158319450884 is a deficient number, since it is larger than the sum of its proper divisors (1723776798203).

2158319450884 is an frugal number, since it uses more digits than its factorization.

2158319450884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39784 (or 19892 counting only the distinct ones).

The product of its (nonzero) digits is 11059200, while the sum is 58.

The spelling of 2158319450884 in words is "two trillion, one hundred fifty-eight billion, three hundred nineteen million, four hundred fifty thousand, eight hundred eighty-four".