111361618453 has 2 divisors, whose sum is σ = 111361618454. Its totient is φ = 111361618452.

The previous prime is 111361618451. The next prime is 111361618457. The reversal of 111361618453 is 354816163111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78897506769 + 32464111684 = 280887^2 + 180178^2 .

It is a cyclic number.

It is not a de Polignac number, because 111361618453 - 2¹ = 111361618451 is a prime.

It is a super-2 number, since 2×111361618453² (a number of 23 digits) contains 22 as substring.

Together with 111361618451, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111361618451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55680809226 + 55680809227.

It is an arithmetic number, because the mean of its divisors is an integer number (55680809227).

Almost surely, 2^111361618453 is an apocalyptic number.

It is an amenable number.

111361618453 is a deficient number, since it is larger than the sum of its proper divisors (1).

111361618453 is an equidigital number, since it uses as much as digits as its factorization.

111361618453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 40.

The spelling of 111361618453 in words is "one hundred eleven billion, three hundred sixty-one million, six hundred eighteen thousand, four hundred fifty-three".