611121111144 has 16 divisors (see below), whose sum is σ = 1527802777920. Its totient is φ = 203707037040.

The previous prime is 611121111143. The next prime is 611121111287. The reversal of 611121111144 is 441111121116.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 25463379631 = 611121111144 / (6 + 1 + 1 + 1 + 2 + 1 + 1 + 1 + 1 + 1 + 4 + 4).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (611121111143) 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, 12731689792 + ... + 12731689839.

It is an arithmetic number, because the mean of its divisors is an integer number (95487673620).

Almost surely, 2^611121111144 is an apocalyptic number.

It is an amenable number.

611121111144 is an abundant number, since it is smaller than the sum of its proper divisors (916681666776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

611121111144 is a wasteful number, since it uses less digits than its factorization.

611121111144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25463379640 (or 25463379636 counting only the distinct ones).

The product of its digits is 192, while the sum is 24.

The spelling of 611121111144 in words is "six hundred eleven billion, one hundred twenty-one million, one hundred eleven thousand, one hundred forty-four".