111554215457 has 2 divisors, whose sum is σ = 111554215458. Its totient is φ = 111554215456.

The previous prime is 111554215403. The next prime is 111554215471. The reversal of 111554215457 is 754512455111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110939621776 + 614593681 = 333076^2 + 24791^2 .

It is a cyclic number.

It is not a de Polignac number, because 111554215457 - 2¹⁴ = 111554199073 is a prime.

It is a super-3 number, since 3×111554215457³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (111554215477) 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, 55777107728 + 55777107729.

It is an arithmetic number, because the mean of its divisors is an integer number (55777107729).

Almost surely, 2^111554215457 is an apocalyptic number.

It is an amenable number.

111554215457 is a deficient number, since it is larger than the sum of its proper divisors (1).

111554215457 is an equidigital number, since it uses as much as digits as its factorization.

111554215457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 140000, while the sum is 41.

The spelling of 111554215457 in words is "one hundred eleven billion, five hundred fifty-four million, two hundred fifteen thousand, four hundred fifty-seven".