611560655 has 4 divisors (see below), whose sum is σ = 733872792. Its totient is φ = 489248520.

The previous prime is 611560627. The next prime is 611560681. The reversal of 611560655 is 556065116.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-611560655 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61156061 + ... + 61156070.

It is an arithmetic number, because the mean of its divisors is an integer number (183468198).

Almost surely, 2^611560655 is an apocalyptic number.

611560655 is a deficient number, since it is larger than the sum of its proper divisors (122312137).

611560655 is a wasteful number, since it uses less digits than its factorization.

611560655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122312136.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 611560655 is about 24729.7524249637. The cubic root of 611560655 is about 848.8152606525.

The spelling of 611560655 in words is "six hundred eleven million, five hundred sixty thousand, six hundred fifty-five".