2640340635 has 16 divisors (see below), whose sum is σ = 4473048096. Its totient is φ = 1325347328.

The previous prime is 2640340631. The next prime is 2640340663. The reversal of 2640340635 is 5360430462.

2640340635 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2640340635 - 2² = 2640340631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2640340596 and 2640340605.

It is not an unprimeable number, because it can be changed into a prime (2640340631) 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, 5176884 + ... + 5177393.

It is an arithmetic number, because the mean of its divisors is an integer number (279565506).

Almost surely, 2^2640340635 is an apocalyptic number.

2640340635 is a deficient number, since it is larger than the sum of its proper divisors (1832707461).

2640340635 is a wasteful number, since it uses less digits than its factorization.

2640340635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10354302.

The product of its (nonzero) digits is 51840, while the sum is 33.

The square root of 2640340635 is about 51384.2450075896. The cubic root of 2640340635 is about 1382.1440861735.

The spelling of 2640340635 in words is "two billion, six hundred forty million, three hundred forty thousand, six hundred thirty-five".