656241432642 has 80 divisors (see below), whose sum is σ = 1476848064384. Its totient is φ = 217798956000.

The previous prime is 656241432571. The next prime is 656241432643. The reversal of 656241432642 is 246234142656.

It is a happy number.

656241432642 is a `hidden beast` number, since 6 + 5 + 624 + 14 + 3 + 2 + 6 + 4 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (656241432643) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 84770892 + ... + 84778632.

Almost surely, 2^656241432642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656241432642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (738424032192).

656241432642 is an abundant number, since it is smaller than the sum of its proper divisors (820606631742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

656241432642 is a wasteful number, since it uses less digits than its factorization.

656241432642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9957 (or 9948 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 45.

The spelling of 656241432642 in words is "six hundred fifty-six billion, two hundred forty-one million, four hundred thirty-two thousand, six hundred forty-two".