68387021740 has 24 divisors (see below), whose sum is σ = 147115497312. Its totient is φ = 26687617920.

The previous prime is 68387021707. The next prime is 68387021783. The reversal of 68387021740 is 4712078386.

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, 41698584 + ... + 41700223.

It is an arithmetic number, because the mean of its divisors is an integer number (6129812388).

Almost surely, 2^68387021740 is an apocalyptic number.

It is an amenable number.

68387021740 is an abundant number, since it is smaller than the sum of its proper divisors (78728475572).

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

68387021740 is a wasteful number, since it uses less digits than its factorization.

68387021740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83398857 (or 83398855 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 46.

The spelling of 68387021740 in words is "sixty-eight billion, three hundred eighty-seven million, twenty-one thousand, seven hundred forty".