611442240212 has 6 divisors (see below), whose sum is σ = 1070023920378. Its totient is φ = 305721120104.

The previous prime is 611442240181. The next prime is 611442240239. The reversal of 611442240212 is 212042244116.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 569910245776 + 41531994436 = 754924^2 + 203794^2 .

It is a super-2 number, since 2×611442240212² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 76430280023 + ... + 76430280030.

It is an arithmetic number, because the mean of its divisors is an integer number (178337320063).

Almost surely, 2^611442240212 is an apocalyptic number.

It is an amenable number.

611442240212 is a deficient number, since it is larger than the sum of its proper divisors (458581680166).

611442240212 is a wasteful number, since it uses less digits than its factorization.

611442240212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152860560057 (or 152860560055 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 611442240212 its reverse (212042244116), we get a palindrome (823484484328).

The spelling of 611442240212 in words is "six hundred eleven billion, four hundred forty-two million, two hundred forty thousand, two hundred twelve".