117854744621 has 2 divisors, whose sum is σ = 117854744622. Its totient is φ = 117854744620.

The previous prime is 117854744603. The next prime is 117854744633. The reversal of 117854744621 is 126447458711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102524838025 + 15329906596 = 320195^2 + 123814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117854744621 is a prime.

It is a super-2 number, since 2×117854744621² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 117854744621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117854704621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58927372310 + 58927372311.

It is an arithmetic number, because the mean of its divisors is an integer number (58927372311).

Almost surely, 2^117854744621 is an apocalyptic number.

It is an amenable number.

117854744621 is a deficient number, since it is larger than the sum of its proper divisors (1).

117854744621 is an equidigital number, since it uses as much as digits as its factorization.

117854744621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1505280, while the sum is 50.

The spelling of 117854744621 in words is "one hundred seventeen billion, eight hundred fifty-four million, seven hundred forty-four thousand, six hundred twenty-one".