611956609 has 4 divisors (see below), whose sum is σ = 667589040. Its totient is φ = 556324180.

The previous prime is 611956601. The next prime is 611956621. The reversal of 611956609 is 906659116.

611956609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 611956609 - 2³ = 611956601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611956601) 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, 27816199 + ... + 27816220.

It is an arithmetic number, because the mean of its divisors is an integer number (166897260).

Almost surely, 2^611956609 is an apocalyptic number.

It is an amenable number.

611956609 is a deficient number, since it is larger than the sum of its proper divisors (55632431).

611956609 is a wasteful number, since it uses less digits than its factorization.

611956609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55632430.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 611956609 is about 24737.7567495519. The cubic root of 611956609 is about 848.9984091742.

The spelling of 611956609 in words is "six hundred eleven million, nine hundred fifty-six thousand, six hundred nine".