611561066141 has 4 divisors (see below), whose sum is σ = 621926508000. Its totient is φ = 601195624284.

The previous prime is 611561066099. The next prime is 611561066143. The reversal of 611561066141 is 141660165116.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-611561066141 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 611561066095 and 611561066104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611561066143) 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, 5182720841 + ... + 5182720958.

It is an arithmetic number, because the mean of its divisors is an integer number (155481627000).

Almost surely, 2^611561066141 is an apocalyptic number.

It is an amenable number.

611561066141 is a deficient number, since it is larger than the sum of its proper divisors (10365441859).

611561066141 is a wasteful number, since it uses less digits than its factorization.

611561066141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10365441858.

The product of its (nonzero) digits is 25920, while the sum is 38.

The spelling of 611561066141 in words is "six hundred eleven billion, five hundred sixty-one million, sixty-six thousand, one hundred forty-one".