611944821 has 8 divisors (see below), whose sum is σ = 906584960. Its totient is φ = 407963196.

The previous prime is 611944819. The next prime is 611944849. The reversal of 611944821 is 128449116.

611944821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 611944821 - 2¹ = 611944819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611944621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11332285 + ... + 11332338.

It is an arithmetic number, because the mean of its divisors is an integer number (113323120).

Almost surely, 2^611944821 is an apocalyptic number.

It is an amenable number.

611944821 is a deficient number, since it is larger than the sum of its proper divisors (294640139).

611944821 is a wasteful number, since it uses less digits than its factorization.

611944821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22664632 (or 22664626 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 611944821 is about 24737.5184891290. The cubic root of 611944821 is about 848.9929577760.

The spelling of 611944821 in words is "six hundred eleven million, nine hundred forty-four thousand, eight hundred twenty-one".