656423144330 has 32 divisors (see below), whose sum is σ = 1232981222400. Its totient is φ = 251143564672.

The previous prime is 656423144281. The next prime is 656423144369. The reversal of 656423144330 is 33441324656.

It is a super-2 number, since 2×656423144330² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9791966 + ... + 9858774.

It is an arithmetic number, because the mean of its divisors is an integer number (38530663200).

Almost surely, 2^656423144330 is an apocalyptic number.

656423144330 is a deficient number, since it is larger than the sum of its proper divisors (576558078070).

656423144330 is a wasteful number, since it uses less digits than its factorization.

656423144330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109558.

The product of its (nonzero) digits is 622080, while the sum is 41.

Adding to 656423144330 its reverse (33441324656), we get a palindrome (689864468986).

The spelling of 656423144330 in words is "six hundred fifty-six billion, four hundred twenty-three million, one hundred forty-four thousand, three hundred thirty".