611221145641 has 32 divisors (see below), whose sum is σ = 646606471680. Its totient is φ = 576919929600.

The previous prime is 611221145593. The next prime is 611221145659. The reversal of 611221145641 is 146541122116.

It is a cyclic number.

It is not a de Polignac number, because 611221145641 - 2³¹ = 609073661993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 611221145597 and 611221145606.

It is not an unprimeable number, because it can be changed into a prime (611221145441) 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 31 ways as a sum of consecutive naturals, for example, 228834736 + ... + 228837406.

It is an arithmetic number, because the mean of its divisors is an integer number (20206452240).

Almost surely, 2^611221145641 is an apocalyptic number.

611221145641 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

611221145641 is a deficient number, since it is larger than the sum of its proper divisors (35385326039).

611221145641 is a wasteful number, since it uses less digits than its factorization.

611221145641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3505.

The product of its digits is 11520, while the sum is 34.

Adding to 611221145641 its reverse (146541122116), we get a palindrome (757762267757).

The spelling of 611221145641 in words is "six hundred eleven billion, two hundred twenty-one million, one hundred forty-five thousand, six hundred forty-one".