656120201618 has 32 divisors (see below), whose sum is σ = 1127090764800. Its totient is φ = 280616642064.

The previous prime is 656120201551. The next prime is 656120201683. The reversal of 656120201618 is 816102021656.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13918973 + ... + 13966031.

It is an arithmetic number, because the mean of its divisors is an integer number (35221586400).

Almost surely, 2^656120201618 is an apocalyptic number.

656120201618 is a deficient number, since it is larger than the sum of its proper divisors (470970563182).

656120201618 is a wasteful number, since it uses less digits than its factorization.

656120201618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49094.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 656120201618 in words is "six hundred fifty-six billion, one hundred twenty million, two hundred one thousand, six hundred eighteen".