2145741639 has 16 divisors (see below), whose sum is σ = 2960968800. Its totient is φ = 1380548736.

The previous prime is 2145741613. The next prime is 2145741641. The reversal of 2145741639 is 9361475412.

It is not a de Polignac number, because 2145741639 - 2⁵ = 2145741607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2145741639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145741659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266517 + ... + 274449.

It is an arithmetic number, because the mean of its divisors is an integer number (185060550).

Almost surely, 2^2145741639 is an apocalyptic number.

2145741639 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2145741639 is a deficient number, since it is larger than the sum of its proper divisors (815227161).

2145741639 is a wasteful number, since it uses less digits than its factorization.

2145741639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11074.

The product of its digits is 181440, while the sum is 42.

The square root of 2145741639 is about 46322.1506301251. The cubic root of 2145741639 is about 1289.8102076408.

The spelling of 2145741639 in words is "two billion, one hundred forty-five million, seven hundred forty-one thousand, six hundred thirty-nine".