656231354447 has 8 divisors (see below), whose sum is σ = 662190602544. Its totient is φ = 650274771328.

The previous prime is 656231354419. The next prime is 656231354453. The reversal of 656231354447 is 744453132656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656231354447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 656231354395 and 656231354404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656231354417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169853 + ... + 1158150.

It is an arithmetic number, because the mean of its divisors is an integer number (82773825318).

Almost surely, 2^656231354447 is an apocalyptic number.

656231354447 is a deficient number, since it is larger than the sum of its proper divisors (5959248097).

656231354447 is a wasteful number, since it uses less digits than its factorization.

656231354447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332489.

The product of its digits is 7257600, while the sum is 50.

The spelling of 656231354447 in words is "six hundred fifty-six billion, two hundred thirty-one million, three hundred fifty-four thousand, four hundred forty-seven".