2640726407 has 8 divisors (see below), whose sum is σ = 2881218432. Its totient is φ = 2400305400.

The previous prime is 2640726397. The next prime is 2640726421. The reversal of 2640726407 is 7046270462.

2640726407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2640726407 - 2⁴ = 2640726391 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 (2640726437) 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, 86798 + ... + 113204.

It is an arithmetic number, because the mean of its divisors is an integer number (360152304).

Almost surely, 2^2640726407 is an apocalyptic number.

2640726407 is a deficient number, since it is larger than the sum of its proper divisors (240492025).

2640726407 is a wasteful number, since it uses less digits than its factorization.

2640726407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35509.

The product of its (nonzero) digits is 112896, while the sum is 38.

The square root of 2640726407 is about 51387.9986670040. The cubic root of 2640726407 is about 1382.2113964940.

Adding to 2640726407 its reverse (7046270462), we get a palindrome (9686996869).

The spelling of 2640726407 in words is "two billion, six hundred forty million, seven hundred twenty-six thousand, four hundred seven".