918370397563 has 2 divisors, whose sum is σ = 918370397564. Its totient is φ = 918370397562.

The previous prime is 918370397473. The next prime is 918370397569. The reversal of 918370397563 is 365793073819.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 918370397563 - 2²⁵ = 918336843131 is a prime.

It is not a weakly prime, because it can be changed into another prime (918370397569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459185198781 + 459185198782.

It is an arithmetic number, because the mean of its divisors is an integer number (459185198782).

Almost surely, 2^918370397563 is an apocalyptic number.

918370397563 is a deficient number, since it is larger than the sum of its proper divisors (1).

918370397563 is an equidigital number, since it uses as much as digits as its factorization.

918370397563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25719120, while the sum is 61.

The spelling of 918370397563 in words is "nine hundred eighteen billion, three hundred seventy million, three hundred ninety-seven thousand, five hundred sixty-three".