68949802256 has 10 divisors (see below), whose sum is σ = 133590241902. Its totient is φ = 34474901120.

The previous prime is 68949802249. The next prime is 68949802279. The reversal of 68949802256 is 65220894986.

It can be written as a sum of positive squares in only one way, i.e., 58233411856 + 10716390400 = 241316^2 + 103520^2 .

It is a super-2 number, since 2×68949802256² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68949802195 and 68949802204.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2154681305 + ... + 2154681336.

Almost surely, 2^68949802256 is an apocalyptic number.

It is an amenable number.

68949802256 is a deficient number, since it is larger than the sum of its proper divisors (64640439646).

68949802256 is a wasteful number, since it uses less digits than its factorization.

68949802256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4309362649 (or 4309362643 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 59.

The spelling of 68949802256 in words is "sixty-eight billion, nine hundred forty-nine million, eight hundred two thousand, two hundred fifty-six".