6442787141656 has 64 divisors (see below), whose sum is σ = 12656355909120. Its totient is φ = 3068895624960.

The previous prime is 6442787141641. The next prime is 6442787141689. The reversal of 6442787141656 is 6561417872446.

It is a super-2 number, since 2×6442787141656² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6442787141594 and 6442787141603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245866651 + ... + 245892853.

It is an arithmetic number, because the mean of its divisors is an integer number (197755561080).

Almost surely, 2^{6442787141656} is an apocalyptic number.

It is an amenable number.

6442787141656 is a deficient number, since it is larger than the sum of its proper divisors (6213568767464).

6442787141656 is a wasteful number, since it uses less digits than its factorization.

6442787141656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31576 (or 31572 counting only the distinct ones).

The product of its digits is 54190080, while the sum is 61.

The spelling of 6442787141656 in words is "six trillion, four hundred forty-two billion, seven hundred eighty-seven million, one hundred forty-one thousand, six hundred fifty-six".