2057760809 has 8 divisors (see below), whose sum is σ = 2275943880. Its totient is φ = 1848134016.

The previous prime is 2057760787. The next prime is 2057760823. The reversal of 2057760809 is 9080677502.

It can be written as a sum of positive squares in 4 ways, for example, as 598291600 + 1459469209 = 24460^2 + 38203^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-2057760809 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 2057760809.

It is not an unprimeable number, because it can be changed into a prime (2057760899) 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, 2138564 + ... + 2139525.

It is an arithmetic number, because the mean of its divisors is an integer number (284492985).

Almost surely, 2^2057760809 is an apocalyptic number.

It is an amenable number.

2057760809 is a deficient number, since it is larger than the sum of its proper divisors (218183071).

2057760809 is a wasteful number, since it uses less digits than its factorization.

2057760809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4278139.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 2057760809 is about 45362.5485284943. The cubic root of 2057760809 is about 1271.9351342873.

The spelling of 2057760809 in words is "two billion, fifty-seven million, seven hundred sixty thousand, eight hundred nine".