656111155061 has 4 divisors (see below), whose sum is σ = 656117577324. Its totient is φ = 656104732800.

The previous prime is 656111155033. The next prime is 656111155171. The reversal of 656111155061 is 160551111656.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 219975070225 + 436136084836 = 469015^2 + 660406^2 .

It is a cyclic number.

It is not a de Polignac number, because 656111155061 - 2¹⁴ = 656111138677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656111155001) 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, 3055370 + ... + 3263051.

It is an arithmetic number, because the mean of its divisors is an integer number (164029394331).

Almost surely, 2^656111155061 is an apocalyptic number.

It is an amenable number.

656111155061 is a deficient number, since it is larger than the sum of its proper divisors (6422263).

656111155061 is a wasteful number, since it uses less digits than its factorization.

656111155061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6422262.

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 656111155061 in words is "six hundred fifty-six billion, one hundred eleven million, one hundred fifty-five thousand, sixty-one".