656439542 has 8 divisors (see below), whose sum is σ = 1074173832. Its totient is φ = 298381600.

The previous prime is 656439541. The next prime is 656439557. The reversal of 656439542 is 245934656.

656439542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 656439493 and 656439502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656439541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14919059 + ... + 14919102.

It is an arithmetic number, because the mean of its divisors is an integer number (134271729).

Almost surely, 2^656439542 is an apocalyptic number.

656439542 is a deficient number, since it is larger than the sum of its proper divisors (417734290).

656439542 is a wasteful number, since it uses less digits than its factorization.

656439542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29838174.

The product of its digits is 777600, while the sum is 44.

The square root of 656439542 is about 25621.0761288436. The cubic root of 656439542 is about 869.0903170465.

The spelling of 656439542 in words is "six hundred fifty-six million, four hundred thirty-nine thousand, five hundred forty-two".