2640460073 has 4 divisors (see below), whose sum is σ = 2640950100. Its totient is φ = 2639970048.

The previous prime is 2640460051. The next prime is 2640460087. The reversal of 2640460073 is 3700640462.

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 951907609 + 1688552464 = 30853^2 + 41092^2 .

It is a cyclic number.

It is not a de Polignac number, because 2640460073 - 2⁸ = 2640459817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2640460013) 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, 236840 + ... + 247737.

It is an arithmetic number, because the mean of its divisors is an integer number (660237525).

Almost surely, 2^2640460073 is an apocalyptic number.

It is an amenable number.

2640460073 is a deficient number, since it is larger than the sum of its proper divisors (490027).

2640460073 is an equidigital number, since it uses as much as digits as its factorization.

2640460073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490026.

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 2640460073 is about 51385.4071989315. The cubic root of 2640460073 is about 1382.1649266709.

The spelling of 2640460073 in words is "two billion, six hundred forty million, four hundred sixty thousand, seventy-three".