2149340719969 has 9 divisors (see below), whose sum is σ = 2283236167827. Its totient is φ = 2022885455904.

The previous prime is 2149340719961. The next prime is 2149340720017. The reversal of 2149340719969 is 9699170439412.

The square root of 2149340719969 is 1466063.

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

It can be written as a sum of positive squares in only one way, i.e., 1673362152225 + 475978567744 = 1293585^2 + 689912^2 .

It is not a de Polignac number, because 2149340719969 - 2³ = 2149340719961 is a prime.

It is a super-2 number, since 2×2149340719969² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2149340719969.

It is not an unprimeable number, because it can be changed into a prime (2149340719961) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 24879952 + ... + 24966190.

Almost surely, 2^{2149340719969} is an apocalyptic number.

2149340719969 is the 1466063-rd square number.

2149340719969 is the 733032-nd centered octagonal number.

It is an amenable number.

2149340719969 is a deficient number, since it is larger than the sum of its proper divisors (133895447858).

2149340719969 is an frugal number, since it uses more digits than its factorization.

2149340719969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172512 (or 86256 counting only the distinct ones).

The product of its (nonzero) digits is 26453952, while the sum is 64.

Multiplying 2149340719969 by its sum of digits (64), we get a square (137557806078016 = 11728504²).

The spelling of 2149340719969 in words is "two trillion, one hundred forty-nine billion, three hundred forty million, seven hundred nineteen thousand, nine hundred sixty-nine".