611231543441 has 4 divisors (see below), whose sum is σ = 647186340132. Its totient is φ = 575276746752.

The previous prime is 611231543401. The next prime is 611231543501. The reversal of 611231543441 is 144345132116.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 181387402816 + 429844140625 = 425896^2 + 655625^2 .

It is a cyclic number.

It is not a de Polignac number, because 611231543441 - 2¹⁴ = 611231527057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611231543401) 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, 17977398320 + ... + 17977398353.

It is an arithmetic number, because the mean of its divisors is an integer number (161796585033).

Almost surely, 2^611231543441 is an apocalyptic number.

It is an amenable number.

611231543441 is a deficient number, since it is larger than the sum of its proper divisors (35954796691).

611231543441 is a wasteful number, since it uses less digits than its factorization.

611231543441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35954796690.

The product of its digits is 34560, while the sum is 35.

Adding to 611231543441 its reverse (144345132116), we get a palindrome (755576675557).

The spelling of 611231543441 in words is "six hundred eleven billion, two hundred thirty-one million, five hundred forty-three thousand, four hundred forty-one".