611553216123 has 6 divisors (see below), whose sum is σ = 883354645524. Its totient is φ = 407702144076.

The previous prime is 611553216097. The next prime is 611553216151. The reversal of 611553216123 is 321612355116.

611553216123 is a `hidden beast` number, since 6 + 1 + 1 + 5 + 5 + 32 + 1 + 612 + 3 = 666.

It is not a de Polignac number, because 611553216123 - 2¹⁴ = 611553199739 is a prime.

It is a super-2 number, since 2×611553216123² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (611553216623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33975178665 + ... + 33975178682.

It is an arithmetic number, because the mean of its divisors is an integer number (147225774254).

Almost surely, 2^611553216123 is an apocalyptic number.

611553216123 is a deficient number, since it is larger than the sum of its proper divisors (271801429401).

611553216123 is a wasteful number, since it uses less digits than its factorization.

611553216123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67950357353 (or 67950357350 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The spelling of 611553216123 in words is "six hundred eleven billion, five hundred fifty-three million, two hundred sixteen thousand, one hundred twenty-three".