2061139734889 has 27 divisors (see below), whose sum is σ = 2219657815557. Its totient is φ = 1913548860288.

The previous prime is 2061139734859. The next prime is 2061139734893. The reversal of 2061139734889 is 9884379311602.

The square root of 2061139734889 is 1435667.

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 139334225625 + 1921805509264 = 373275^2 + 1386292^2 .

It is not a de Polignac number, because 2061139734889 - 2¹³ = 2061139726697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2061139734859) 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, 1928100247 + ... + 1928101315.

Almost surely, 2^{2061139734889} is an apocalyptic number.

2061139734889 is the 1435667-th square number.

2061139734889 is the 717834-th centered octagonal number.

It is an amenable number.

2061139734889 is a deficient number, since it is larger than the sum of its proper divisors (158518080668).

2061139734889 is an frugal number, since it uses more digits than its factorization.

2061139734889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2330 (or 1165 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 61.

The spelling of 2061139734889 in words is "two trillion, sixty-one billion, one hundred thirty-nine million, seven hundred thirty-four thousand, eight hundred eighty-nine".