611101111601 has 4 divisors (see below), whose sum is σ = 626006016804. Its totient is φ = 596196206400.

The previous prime is 611101111561. The next prime is 611101111631. The reversal of 611101111601 is 106111101116.

611101111601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48602611600 + 562498500001 = 220460^2 + 749999^2 .

It is a cyclic number.

It is not a de Polignac number, because 611101111601 - 2¹⁰ = 611101110577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611101111631) 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, 7452452540 + ... + 7452452621.

It is an arithmetic number, because the mean of its divisors is an integer number (156501504201).

Almost surely, 2^611101111601 is an apocalyptic number.

It is an amenable number.

611101111601 is a deficient number, since it is larger than the sum of its proper divisors (14904905203).

611101111601 is a wasteful number, since it uses less digits than its factorization.

611101111601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14904905202.

The product of its (nonzero) digits is 36, while the sum is 20.

Adding to 611101111601 its reverse (106111101116), we get a palindrome (717212212717).

It can be divided in two parts, 61110 and 1111601, that added together give a palindrome (1172711).

The spelling of 611101111601 in words is "six hundred eleven billion, one hundred one million, one hundred eleven thousand, six hundred one".