655656011565 has 64 divisors (see below), whose sum is σ = 1173215404800. Its totient is φ = 311210532864.

The previous prime is 655656011561. The next prime is 655656011617. The reversal of 655656011565 is 565110656556.

It is not a de Polignac number, because 655656011565 - 2² = 655656011561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655656011561) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 766212 + ... + 1377821.

It is an arithmetic number, because the mean of its divisors is an integer number (18331490700).

Almost surely, 2^655656011565 is an apocalyptic number.

It is an amenable number.

655656011565 is a deficient number, since it is larger than the sum of its proper divisors (517559393235).

655656011565 is a wasteful number, since it uses less digits than its factorization.

655656011565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144126.

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

The spelling of 655656011565 in words is "six hundred fifty-five billion, six hundred fifty-six million, eleven thousand, five hundred sixty-five".