2056149899 has 4 divisors (see below), whose sum is σ = 2063737440. Its totient is φ = 2048562360.

The previous prime is 2056149859. The next prime is 2056149917. The reversal of 2056149899 is 9989416502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2056149899 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 2056149899.

It is not an unprimeable number, because it can be changed into a prime (2056149859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3793364 + ... + 3793905.

It is an arithmetic number, because the mean of its divisors is an integer number (515934360).

Almost surely, 2^2056149899 is an apocalyptic number.

2056149899 is a deficient number, since it is larger than the sum of its proper divisors (7587541).

2056149899 is an equidigital number, since it uses as much as digits as its factorization.

2056149899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7587540.

The product of its (nonzero) digits is 1399680, while the sum is 53.

The square root of 2056149899 is about 45344.7891052544. The cubic root of 2056149899 is about 1271.6031378234.

The spelling of 2056149899 in words is "two billion, fifty-six million, one hundred forty-nine thousand, eight hundred ninety-nine".