68031437647 has 8 divisors (see below), whose sum is σ = 70382214000. Its totient is φ = 65680985664.

The previous prime is 68031437633. The next prime is 68031437671. The reversal of 68031437647 is 74673413086.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68031437647 - 2⁷ = 68031437519 is a prime.

It is a super-3 number, since 3×68031437647³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68031437647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68031437347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392604 + ... + 538702.

It is an arithmetic number, because the mean of its divisors is an integer number (8797776750).

Almost surely, 2^68031437647 is an apocalyptic number.

68031437647 is a deficient number, since it is larger than the sum of its proper divisors (2350776353).

68031437647 is a wasteful number, since it uses less digits than its factorization.

68031437647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162185.

The product of its (nonzero) digits is 2032128, while the sum is 49.

The spelling of 68031437647 in words is "sixty-eight billion, thirty-one million, four hundred thirty-seven thousand, six hundred forty-seven".