2640416893 has 2 divisors, whose sum is σ = 2640416894. Its totient is φ = 2640416892.

The previous prime is 2640416881. The next prime is 2640416899. The reversal of 2640416893 is 3986140462.

It is a happy number.

2640416893 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., 1703873284 + 936543609 = 41278^2 + 30603^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2640416893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2640416899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320208446 + 1320208447.

It is an arithmetic number, because the mean of its divisors is an integer number (1320208447).

Almost surely, 2^2640416893 is an apocalyptic number.

It is an amenable number.

2640416893 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640416893 is an equidigital number, since it uses as much as digits as its factorization.

2640416893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 2640416893 is about 51384.9870390175. The cubic root of 2640416893 is about 1382.1573923517.

The spelling of 2640416893 in words is "two billion, six hundred forty million, four hundred sixteen thousand, eight hundred ninety-three".