68387038840 has 16 divisors (see below), whose sum is σ = 153870837480. Its totient is φ = 27354815520.

The previous prime is 68387038829. The next prime is 68387038849. The reversal of 68387038840 is 4883078386.

It is a super-3 number, since 3×68387038840³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68387038849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 854837946 + ... + 854838025.

Almost surely, 2^68387038840 is an apocalyptic number.

It is an amenable number.

68387038840 is an abundant number, since it is smaller than the sum of its proper divisors (85483798640).

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

68387038840 is a wasteful number, since it uses less digits than its factorization.

68387038840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709675982 (or 1709675978 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 55.

The spelling of 68387038840 in words is "sixty-eight billion, three hundred eighty-seven million, thirty-eight thousand, eight hundred forty".