656155141551656 has 16 divisors (see below), whose sum is σ = 1245864192820800. Its totient is φ = 323924690132784.

The previous prime is 656155141551599. The next prime is 656155141551661.

656155141551656 is nontrivially palindromic in base 10.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519110079710 + ... + 519110080973.

It is an arithmetic number, because the mean of its divisors is an integer number (77866512051300).

Almost surely, 2^{656155141551656} is an apocalyptic number.

It is an amenable number.

656155141551656 is a deficient number, since it is larger than the sum of its proper divisors (589709051269144).

656155141551656 is a wasteful number, since it uses less digits than its factorization.

656155141551656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038220160768 (or 1038220160764 counting only the distinct ones).

The product of its digits is 81000000, while the sum is 62.

Adding to 656155141551656 its product of digits (81000000), we get a palindrome (656155222551656).

Subtracting from 656155141551656 its product of digits (81000000), we obtain a palindrome (656155060551656).

The spelling of 656155141551656 in words is "six hundred fifty-six trillion, one hundred fifty-five billion, one hundred forty-one million, five hundred fifty-one thousand, six hundred fifty-six".