2139889162896 has 135 divisors (see below), whose sum is σ = 6038997809481. Its totient is φ = 707357273472.

The previous prime is 2139889162867. The next prime is 2139889162897. The reversal of 2139889162896 is 6982619889312.

The square root of 2139889162896 is 1462836.

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

2139889162896 is a `hidden beast` number, since 2 + 1 + 398 + 8 + 91 + 62 + 8 + 96 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1802950707600 + 336938455296 = 1342740^2 + 580464^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (2139889162897) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2440010010 + ... + 2440010886.

Almost surely, 2^{2139889162896} is an apocalyptic number.

2139889162896 is the 1462836-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139889162896

2139889162896 is an abundant number, since it is smaller than the sum of its proper divisors (3899108646585).

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

2139889162896 is an frugal number, since it uses more digits than its factorization.

2139889162896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2046 (or 1021 counting only the distinct ones).

The product of its digits is 161243136, while the sum is 72.

The spelling of 2139889162896 in words is "two trillion, one hundred thirty-nine billion, eight hundred eighty-nine million, one hundred sixty-two thousand, eight hundred ninety-six".