111561463441 has 4 divisors (see below), whose sum is σ = 111568942192. Its totient is φ = 111553984692.

The previous prime is 111561463397. The next prime is 111561463457. The reversal of 111561463441 is 144364165111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 144364165111 = 29 ⋅4978074659.

It is a cyclic number.

It is not a de Polignac number, because 111561463441 - 2¹⁷ = 111561332369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111561463441.

It is not an unprimeable number, because it can be changed into a prime (111561460441) 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, 3716955 + ... + 3746848.

It is an arithmetic number, because the mean of its divisors is an integer number (27892235548).

Almost surely, 2^111561463441 is an apocalyptic number.

It is an amenable number.

111561463441 is a deficient number, since it is larger than the sum of its proper divisors (7478751).

111561463441 is an equidigital number, since it uses as much as digits as its factorization.

111561463441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7478750.

The product of its digits is 34560, while the sum is 37.

The spelling of 111561463441 in words is "one hundred eleven billion, five hundred sixty-one million, four hundred sixty-three thousand, four hundred forty-one".