117777789541 has 2 divisors, whose sum is σ = 117777789542. Its totient is φ = 117777789540.

The previous prime is 117777789529. The next prime is 117777789559. The reversal of 117777789541 is 145987777711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67386968100 + 50390821441 = 259590^2 + 224479^2 .

It is an emirp because it is prime and its reverse (145987777711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117777789541 - 2¹⁵ = 117777756773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117777789841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58888894770 + 58888894771.

It is an arithmetic number, because the mean of its divisors is an integer number (58888894771).

Almost surely, 2^117777789541 is an apocalyptic number.

It is an amenable number.

117777789541 is a deficient number, since it is larger than the sum of its proper divisors (1).

117777789541 is an equidigital number, since it uses as much as digits as its factorization.

117777789541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24202080, while the sum is 64.

The spelling of 117777789541 in words is "one hundred seventeen billion, seven hundred seventy-seven million, seven hundred eighty-nine thousand, five hundred forty-one".