611556506655 has 16 divisors (see below), whose sum is σ = 978500886144. Its totient is φ = 326159978400.

The previous prime is 611556506651. The next prime is 611556506681. The reversal of 611556506655 is 556605655116.

It is not a de Polignac number, because 611556506655 - 2² = 611556506651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 611556506598 and 611556506607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611556506651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1880880 + ... + 2181930.

It is an arithmetic number, because the mean of its divisors is an integer number (61156305384).

Almost surely, 2^611556506655 is an apocalyptic number.

611556506655 is a deficient number, since it is larger than the sum of its proper divisors (366944379489).

611556506655 is a wasteful number, since it uses less digits than its factorization.

611556506655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436486.

The product of its (nonzero) digits is 4050000, while the sum is 51.

The spelling of 611556506655 in words is "six hundred eleven billion, five hundred fifty-six million, five hundred six thousand, six hundred fifty-five".