6922640591 has 2 divisors, whose sum is σ = 6922640592. Its totient is φ = 6922640590.

The previous prime is 6922640581. The next prime is 6922640617. The reversal of 6922640591 is 1950462296.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6922640591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6922640581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3461320295 + 3461320296.

It is an arithmetic number, because the mean of its divisors is an integer number (3461320296).

Almost surely, 2^6922640591 is an apocalyptic number.

6922640591 is a deficient number, since it is larger than the sum of its proper divisors (1).

6922640591 is an equidigital number, since it uses as much as digits as its factorization.

6922640591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 6922640591 is about 83202.4073630084. The cubic root of 6922640591 is about 1905.8582429906.

The spelling of 6922640591 in words is "six billion, nine hundred twenty-two million, six hundred forty thousand, five hundred ninety-one".