2109486093649 has 45 divisors (see below), whose sum is σ = 2416895230071. Its totient is φ = 1839792995040.

The previous prime is 2109486093619. The next prime is 2109486093661. The reversal of 2109486093649 is 9463906849012.

The square root of 2109486093649 is 1452407.

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

It can be written as a sum of positive squares in 7 ways, for example, as 1395576009025 + 713910084624 = 1181345^2 + 844932^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2109486093649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2109486093619) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 13436217079 + ... + 13436217235.

Almost surely, 2^{2109486093649} is an apocalyptic number.

2109486093649 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2109486093649 is the 1452407-th square number.

2109486093649 is the 726204-th centered octagonal number.

It is an amenable number.

2109486093649 is a deficient number, since it is larger than the sum of its proper divisors (307409136422).

2109486093649 is an frugal number, since it uses more digits than its factorization.

2109486093649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 61.

The spelling of 2109486093649 in words is "two trillion, one hundred nine billion, four hundred eighty-six million, ninety-three thousand, six hundred forty-nine".