2149136639 has 8 divisors (see below), whose sum is σ = 2326449552. Its totient is φ = 1973537280.

The previous prime is 2149136599. The next prime is 2149136641. The reversal of 2149136639 is 9366319412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2149136639 - 2¹² = 2149132543 is a prime.

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 2149136639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2149136699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425777 + ... + 430794.

It is an arithmetic number, because the mean of its divisors is an integer number (290806194).

Almost surely, 2^2149136639 is an apocalyptic number.

2149136639 is a deficient number, since it is larger than the sum of its proper divisors (177312913).

2149136639 is a wasteful number, since it uses less digits than its factorization.

2149136639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856777.

The product of its digits is 209952, while the sum is 44.

The square root of 2149136639 is about 46358.7816815757. The cubic root of 2149136639 is about 1290.4900966146.

The spelling of 2149136639 in words is "two billion, one hundred forty-nine million, one hundred thirty-six thousand, six hundred thirty-nine".