122663336491 has 4 divisors (see below), whose sum is σ = 122665046400. Its totient is φ = 122661626584.

The previous prime is 122663336473. The next prime is 122663336557. The reversal of 122663336491 is 194633366221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122663336491 - 2⁹ = 122663335979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122663336401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742411 + ... + 892468.

It is an arithmetic number, because the mean of its divisors is an integer number (30666261600).

Almost surely, 2^122663336491 is an apocalyptic number.

122663336491 is a deficient number, since it is larger than the sum of its proper divisors (1709909).

122663336491 is an equidigital number, since it uses as much as digits as its factorization.

122663336491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709908.

The product of its digits is 839808, while the sum is 46.

The spelling of 122663336491 in words is "one hundred twenty-two billion, six hundred sixty-three million, three hundred thirty-six thousand, four hundred ninety-one".