2071356649 has 4 divisors (see below), whose sum is σ = 2180375440. Its totient is φ = 1962337860.

The previous prime is 2071356643. The next prime is 2071356739. The reversal of 2071356649 is 9466531702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2071356649 - 2³ = 2071356641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2071356641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54509367 + ... + 54509404.

It is an arithmetic number, because the mean of its divisors is an integer number (545093860).

Almost surely, 2^2071356649 is an apocalyptic number.

It is an amenable number.

2071356649 is a deficient number, since it is larger than the sum of its proper divisors (109018791).

2071356649 is a wasteful number, since it uses less digits than its factorization.

2071356649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109018790.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 2071356649 is about 45512.1593532981. The cubic root of 2071356649 is about 1274.7302567130.

The spelling of 2071356649 in words is "two billion, seventy-one million, three hundred fifty-six thousand, six hundred forty-nine".