2653166540065 has 8 divisors (see below), whose sum is σ = 3193247327400. Its totient is φ = 2116234912512.

The previous prime is 2653166540053. The next prime is 2653166540071. The reversal of 2653166540065 is 5600456613562.

It can be written as a sum of positive squares in 4 ways, for example, as 113643826321 + 2539522713744 = 337111^2 + 1593588^2 .

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 2653166540065 - 2¹⁹ = 2653166015777 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 787288090 + ... + 787291459.

It is an arithmetic number, because the mean of its divisors is an integer number (399155915925).

Almost surely, 2^{2653166540065} is an apocalyptic number.

It is an amenable number.

2653166540065 is a deficient number, since it is larger than the sum of its proper divisors (540080787335).

2653166540065 is a wasteful number, since it uses less digits than its factorization.

2653166540065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574579891.

The product of its (nonzero) digits is 3888000, while the sum is 49.

The spelling of 2653166540065 in words is "two trillion, six hundred fifty-three billion, one hundred sixty-six million, five hundred forty thousand, sixty-five".