611240655 has 16 divisors (see below), whose sum is σ = 979735680. Its totient is φ = 325411488.

The previous prime is 611240647. The next prime is 611240677. The reversal of 611240655 is 556042116.

It is not a de Polignac number, because 611240655 - 2³ = 611240647 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 27745 + ... + 44634.

It is an arithmetic number, because the mean of its divisors is an integer number (61233480).

Almost surely, 2^611240655 is an apocalyptic number.

611240655 is a deficient number, since it is larger than the sum of its proper divisors (368495025).

611240655 is a wasteful number, since it uses less digits than its factorization.

611240655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72950.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 611240655 is about 24723.2816389734. The cubic root of 611240655 is about 848.6671868840.

The spelling of 611240655 in words is "six hundred eleven million, two hundred forty thousand, six hundred fifty-five".