7801805656256 has 14 divisors (see below), whose sum is σ = 15481708099260. Its totient is φ = 3900902828096.

The previous prime is 7801805656237. The next prime is 7801805656261. The reversal of 7801805656256 is 6526565081087.

It is a happy number.

It is a super-2 number, since 2×7801805656256² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7801805656195 and 7801805656204.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60951606626 + ... + 60951606753.

Almost surely, 2^{7801805656256} is an apocalyptic number.

It is an amenable number.

7801805656256 is a deficient number, since it is larger than the sum of its proper divisors (7679902443004).

7801805656256 is a wasteful number, since it uses less digits than its factorization.

7801805656256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121903213391 (or 121903213381 counting only the distinct ones).

The product of its (nonzero) digits is 24192000, while the sum is 59.

The spelling of 7801805656256 in words is "seven trillion, eight hundred one billion, eight hundred five million, six hundred fifty-six thousand, two hundred fifty-six".