68030293473981 has 6 divisors (see below), whose sum is σ = 98265979462430. Its totient is φ = 45353528982648.

The previous prime is 68030293473977. The next prime is 68030293474007. The reversal of 68030293473981 is 18937439203086.

68030293473981 is a `hidden beast` number, since 6 + 80 + 3 + 0 + 2 + 9 + 3 + 473 + 9 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 59190173055225 + 8840120418756 = 7693515^2 + 2973234^2 .

It is not a de Polignac number, because 68030293473981 - 2² = 68030293473977 is a prime.

It is a super-2 number, since 2×68030293473981² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68030293473931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3779460748546 + ... + 3779460748563.

Almost surely, 2^{68030293473981} is an apocalyptic number.

It is an amenable number.

68030293473981 is a deficient number, since it is larger than the sum of its proper divisors (30235685988449).

68030293473981 is a wasteful number, since it uses less digits than its factorization.

68030293473981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7558921497115 (or 7558921497112 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

The spelling of 68030293473981 in words is "sixty-eight trillion, thirty billion, two hundred ninety-three million, four hundred seventy-three thousand, nine hundred eighty-one".