111545326561 has 16 divisors (see below), whose sum is σ = 120743400960. Its totient is φ = 102775495680.

The previous prime is 111545326547. The next prime is 111545326577. The reversal of 111545326561 is 165623545111.

It is a cyclic number.

It is not a de Polignac number, because 111545326561 - 2¹³ = 111545318369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111545326861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 674160 + ... + 823153.

It is an arithmetic number, because the mean of its divisors is an integer number (7546462560).

Almost surely, 2^111545326561 is an apocalyptic number.

It is an amenable number.

111545326561 is a deficient number, since it is larger than the sum of its proper divisors (9198074399).

111545326561 is a wasteful number, since it uses less digits than its factorization.

111545326561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497456.

The product of its digits is 108000, while the sum is 40.

The spelling of 111545326561 in words is "one hundred eleven billion, five hundred forty-five million, three hundred twenty-six thousand, five hundred sixty-one".