691542222245219 has 2 divisors, whose sum is σ = 691542222245220. Its totient is φ = 691542222245218.

The previous prime is 691542222245191. The next prime is 691542222245227. The reversal of 691542222245219 is 912542222245196.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-691542222245219 is a prime.

It is a super-2 number, since 2×691542222245219² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (691542222241219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345771111122609 + 345771111122610.

It is an arithmetic number, because the mean of its divisors is an integer number (345771111122610).

Almost surely, 2^{691542222245219} is an apocalyptic number.

691542222245219 is a deficient number, since it is larger than the sum of its proper divisors (1).

691542222245219 is an equidigital number, since it uses as much as digits as its factorization.

691542222245219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12441600, while the sum is 56.

The spelling of 691542222245219 in words is "six hundred ninety-one trillion, five hundred forty-two billion, two hundred twenty-two million, two hundred forty-five thousand, two hundred nineteen".