2061565901 has 8 divisors (see below), whose sum is σ = 2076497304. Its totient is φ = 2046657600.

The previous prime is 2061565871. The next prime is 2061565903. The reversal of 2061565901 is 1095651602.

It can be written as a sum of positive squares in 4 ways, for example, as 13912900 + 2047653001 = 3730^2 + 45251^2 .

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 2061565901 - 2¹⁴ = 2061549517 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 (2061565903) 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, 199211 + ... + 209303.

It is an arithmetic number, because the mean of its divisors is an integer number (259562163).

Almost surely, 2^2061565901 is an apocalyptic number.

It is an amenable number.

2061565901 is a deficient number, since it is larger than the sum of its proper divisors (14931403).

2061565901 is a wasteful number, since it uses less digits than its factorization.

2061565901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11551.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 2061565901 is about 45404.4700552710. The cubic root of 2061565901 is about 1272.7186477818.

The spelling of 2061565901 in words is "two billion, sixty-one million, five hundred sixty-five thousand, nine hundred one".