611553141561 has 8 divisors (see below), whose sum is σ = 815438908800. Its totient is φ = 407684734352.

The previous prime is 611553141517. The next prime is 611553141601. The reversal of 611553141561 is 165141355116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 611553141561 - 2²³ = 611544752953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (611553142561) 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 in 7 ways as a sum of consecutive naturals, for example, 4257585 + ... + 4398878.

It is an arithmetic number, because the mean of its divisors is an integer number (101929863600).

Almost surely, 2^611553141561 is an apocalyptic number.

It is an amenable number.

611553141561 is a deficient number, since it is larger than the sum of its proper divisors (203885767239).

611553141561 is a wasteful number, since it uses less digits than its factorization.

611553141561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8680015.

The product of its digits is 54000, while the sum is 39.

Adding to 611553141561 its reverse (165141355116), we get a palindrome (776694496677).

The spelling of 611553141561 in words is "six hundred eleven billion, five hundred fifty-three million, one hundred forty-one thousand, five hundred sixty-one".