656147121394306 has 4 divisors (see below), whose sum is σ = 984220682091462. Its totient is φ = 328073560697152.

The previous prime is 656147121394267. The next prime is 656147121394367. The reversal of 656147121394306 is 603493121741656.

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 only one way, i.e., 393713892950625 + 262433228443681 = 19842225^2 + 16199791^2 .

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 as a sum of consecutive naturals, namely, 164036780348575 + ... + 164036780348578.

Almost surely, 2^{656147121394306} is an apocalyptic number.

656147121394306 is a deficient number, since it is larger than the sum of its proper divisors (328073560697156).

656147121394306 is a wasteful number, since it uses less digits than its factorization.

656147121394306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328073560697155.

The product of its (nonzero) digits is 19595520, while the sum is 58.

The spelling of 656147121394306 in words is "six hundred fifty-six trillion, one hundred forty-seven billion, one hundred twenty-one million, three hundred ninety-four thousand, three hundred six".