68861783456 has 48 divisors (see below), whose sum is σ = 139342722120. Its totient is φ = 33485844480.

The previous prime is 68861783423. The next prime is 68861783461. The reversal of 68861783456 is 65438716886.

It can be written as a sum of positive squares in 4 ways, for example, as 16722627856 + 52139155600 = 129316^2 + 228340^2 .

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, 24461 + ... + 371916.

Almost surely, 2^68861783456 is an apocalyptic number.

It is an amenable number.

68861783456 is an abundant number, since it is smaller than the sum of its proper divisors (70480938664).

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

68861783456 is a wasteful number, since it uses less digits than its factorization.

68861783456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396537 (or 396529 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 62.

The spelling of 68861783456 in words is "sixty-eight billion, eight hundred sixty-one million, seven hundred eighty-three thousand, four hundred fifty-six".