2147640423289 has 27 divisors (see below), whose sum is σ = 2222813075853. Its totient is φ = 2074983241632.

The previous prime is 2147640423287. The next prime is 2147640423293. The reversal of 2147640423289 is 9823240467412.

The square root of 2147640423289 is 1465483.

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 1744821720889 + 402818702400 = 1320917^2 + 634680^2 .

It is not a de Polignac number, because 2147640423289 - 2¹ = 2147640423287 is a prime.

It is a super-2 number, since 2×2147640423289² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2147640423281) 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, 10901727939 + ... + 10901728135.

Almost surely, 2^{2147640423289} is an apocalyptic number.

2147640423289 is the 1465483-rd square number.

2147640423289 is the 732742-nd centered octagonal number.

It is an amenable number.

2147640423289 is a deficient number, since it is larger than the sum of its proper divisors (75172652564).

2147640423289 is an frugal number, since it uses more digits than its factorization.

2147640423289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 52.

The spelling of 2147640423289 in words is "two trillion, one hundred forty-seven billion, six hundred forty million, four hundred twenty-three thousand, two hundred eighty-nine".