2650257805 has 16 divisors (see below), whose sum is σ = 3426608304. Its totient is φ = 1956165120.

The previous prime is 2650257803. The next prime is 2650257809. The reversal of 2650257805 is 5087520562.

It can be written as a sum of positive squares in 8 ways, for example, as 17952169 + 2632305636 = 4237^2 + 51306^2 .

It is not a de Polignac number, because 2650257805 - 2¹ = 2650257803 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 (2650257803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143457 + ... + 160873.

It is an arithmetic number, because the mean of its divisors is an integer number (214163019).

Almost surely, 2^2650257805 is an apocalyptic number.

It is an amenable number.

2650257805 is a deficient number, since it is larger than the sum of its proper divisors (776350499).

2650257805 is a wasteful number, since it uses less digits than its factorization.

2650257805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19776.

The product of its (nonzero) digits is 168000, while the sum is 40.

The square root of 2650257805 is about 51480.6546675545. The cubic root of 2650257805 is about 1383.8723773654.

The spelling of 2650257805 in words is "two billion, six hundred fifty million, two hundred fifty-seven thousand, eight hundred five".