2056591387 has 8 divisors (see below), whose sum is σ = 2113579152. Its totient is φ = 1999677600.

The previous prime is 2056591351. The next prime is 2056591477. The reversal of 2056591387 is 7831956502.

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 2056591387 - 2¹⁹ = 2056067099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2056591687) 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, 40437 + ... + 75817.

It is an arithmetic number, because the mean of its divisors is an integer number (264197394).

Almost surely, 2^2056591387 is an apocalyptic number.

2056591387 is a deficient number, since it is larger than the sum of its proper divisors (56987765).

2056591387 is a wasteful number, since it uses less digits than its factorization.

2056591387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36989.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 2056591387 is about 45349.6569667291. The cubic root of 2056591387 is about 1271.6941424320.

It can be divided in two parts, 205659 and 1387, that added together give a triangular number (207046 = T₆₄₃).

The spelling of 2056591387 in words is "two billion, fifty-six million, five hundred ninety-one thousand, three hundred eighty-seven".