611220204250 has 16 divisors (see below), whose sum is σ = 1144204222824. Its totient is φ = 244488081600.

The previous prime is 611220204239. The next prime is 611220204251. The reversal of 611220204250 is 52402022116.

It can be written as a sum of positive squares in 4 ways, for example, as 340167731121 + 271052473129 = 583239^2 + 520627^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (611220204251) 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 7 ways as a sum of consecutive naturals, for example, 1222440159 + ... + 1222440658.

Almost surely, 2^611220204250 is an apocalyptic number.

611220204250 is a deficient number, since it is larger than the sum of its proper divisors (532984018574).

611220204250 is a wasteful number, since it uses less digits than its factorization.

611220204250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444880834 (or 2444880824 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 611220204250 its reverse (52402022116), we get a palindrome (663622226366).

The spelling of 611220204250 in words is "six hundred eleven billion, two hundred twenty million, two hundred four thousand, two hundred fifty".