656682580542 has 16 divisors (see below), whose sum is σ = 1319001924240. Its totient is φ = 217954732992.

The previous prime is 656682580531. The next prime is 656682580571. The reversal of 656682580542 is 245085286656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234863617 + ... + 234866412.

It is an arithmetic number, because the mean of its divisors is an integer number (82437620265).

Almost surely, 2^656682580542 is an apocalyptic number.

656682580542 is an abundant number, since it is smaller than the sum of its proper divisors (662319343698).

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

656682580542 is a wasteful number, since it uses less digits than its factorization.

656682580542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469730267.

The product of its (nonzero) digits is 27648000, while the sum is 57.

The spelling of 656682580542 in words is "six hundred fifty-six billion, six hundred eighty-two million, five hundred eighty thousand, five hundred forty-two".