612311055511 has 4 divisors (see below), whose sum is σ = 648329352912. Its totient is φ = 576292758112.

The previous prime is 612311055463. The next prime is 612311055529. The reversal of 612311055511 is 115550113216.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 612311055511 - 2¹⁷ = 612310924439 is a prime.

It is a super-2 number, since 2×612311055511² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612311055571) 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 3 ways as a sum of consecutive naturals, for example, 18009148675 + ... + 18009148708.

It is an arithmetic number, because the mean of its divisors is an integer number (162082338228).

Almost surely, 2^612311055511 is an apocalyptic number.

612311055511 is a deficient number, since it is larger than the sum of its proper divisors (36018297401).

612311055511 is a wasteful number, since it uses less digits than its factorization.

612311055511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36018297400.

The product of its (nonzero) digits is 4500, while the sum is 31.

Adding to 612311055511 its reverse (115550113216), we get a palindrome (727861168727).

The spelling of 612311055511 in words is "six hundred twelve billion, three hundred eleven million, fifty-five thousand, five hundred eleven".