2105677757 has 4 divisors (see below), whose sum is σ = 2145407580. Its totient is φ = 2065947936.

The previous prime is 2105677751. The next prime is 2105677811. The reversal of 2105677757 is 7577765012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1591930201 + 513747556 = 39899^2 + 22666^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105677757 - 2⁴ = 2105677741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105677751) 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, 19864832 + ... + 19864937.

It is an arithmetic number, because the mean of its divisors is an integer number (536351895).

Almost surely, 2^2105677757 is an apocalyptic number.

It is an amenable number.

2105677757 is a deficient number, since it is larger than the sum of its proper divisors (39729823).

2105677757 is an equidigital number, since it uses as much as digits as its factorization.

2105677757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39729822.

The product of its (nonzero) digits is 720300, while the sum is 47.

The square root of 2105677757 is about 45887.6645407020. The cubic root of 2105677757 is about 1281.7322244248.

The spelling of 2105677757 in words is "two billion, one hundred five million, six hundred seventy-seven thousand, seven hundred fifty-seven".