2120191649 has 8 divisors (see below), whose sum is σ = 2247737088. Its totient is φ = 1996343280.

The previous prime is 2120191613. The next prime is 2120191679. The reversal of 2120191649 is 9461910212.

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

It is a cyclic number.

It is not a de Polignac number, because 2120191649 - 2⁸ = 2120191393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2120191679) 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 7 ways as a sum of consecutive naturals, for example, 923087 + ... + 925380.

It is an arithmetic number, because the mean of its divisors is an integer number (280967136).

Almost surely, 2^2120191649 is an apocalyptic number.

It is an amenable number.

2120191649 is a deficient number, since it is larger than the sum of its proper divisors (127545439).

2120191649 is a wasteful number, since it uses less digits than its factorization.

2120191649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848535.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 2120191649 is about 46045.5388610015. The cubic root of 2120191649 is about 1284.6703669820.

The spelling of 2120191649 in words is "two billion, one hundred twenty million, one hundred ninety-one thousand, six hundred forty-nine".