2126730385 has 16 divisors (see below), whose sum is σ = 2749730256. Its totient is φ = 1569742848.

The previous prime is 2126730349. The next prime is 2126730391. The reversal of 2126730385 is 5830376212.

It can be written as a sum of positive squares in 8 ways, for example, as 264290049 + 1862440336 = 16257^2 + 43156^2 .

It is a cyclic number.

It is not a de Polignac number, because 2126730385 - 2¹⁹ = 2126206097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150337 + ... + 163873.

It is an arithmetic number, because the mean of its divisors is an integer number (171858141).

Almost surely, 2^2126730385 is an apocalyptic number.

It is an amenable number.

2126730385 is a deficient number, since it is larger than the sum of its proper divisors (622999871).

2126730385 is a wasteful number, since it uses less digits than its factorization.

2126730385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15972.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 2126730385 is about 46116.4871277074. The cubic root of 2126730385 is about 1285.9896659137.

The spelling of 2126730385 in words is "two billion, one hundred twenty-six million, seven hundred thirty thousand, three hundred eighty-five".