2640905713 has 2 divisors, whose sum is σ = 2640905714. Its totient is φ = 2640905712.

The previous prime is 2640905671. The next prime is 2640905719. The reversal of 2640905713 is 3175090462.

2640905713 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1786921984 + 853983729 = 42272^2 + 29223^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2640905713 is a prime.

It is not a weakly prime, because it can be changed into another prime (2640905719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320452856 + 1320452857.

It is an arithmetic number, because the mean of its divisors is an integer number (1320452857).

Almost surely, 2^2640905713 is an apocalyptic number.

It is an amenable number.

2640905713 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640905713 is an equidigital number, since it uses as much as digits as its factorization.

2640905713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 2640905713 is about 51389.7432665313. The cubic root of 2640905713 is about 1382.2426799553.

The spelling of 2640905713 in words is "two billion, six hundred forty million, nine hundred five thousand, seven hundred thirteen".