611406561 has 8 divisors (see below), whose sum is σ = 815625760. Its totient is φ = 407395872.

The previous prime is 611406559. The next prime is 611406619. The reversal of 611406561 is 165604116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 611406561 - 2¹ = 611406559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611426561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45151 + ... + 57108.

It is an arithmetic number, because the mean of its divisors is an integer number (101953220).

Almost surely, 2^611406561 is an apocalyptic number.

It is an amenable number.

611406561 is a deficient number, since it is larger than the sum of its proper divisors (204219199).

611406561 is a wasteful number, since it uses less digits than its factorization.

611406561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104255.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 611406561 is about 24726.6366697940. The cubic root of 611406561 is about 848.7439631042.

The spelling of 611406561 in words is "six hundred eleven million, four hundred six thousand, five hundred sixty-one".