68721851432 has 64 divisors (see below), whose sum is σ = 148712215680. Its totient is φ = 29518739712.

The previous prime is 68721851339. The next prime is 68721851461. The reversal of 68721851432 is 23415812786.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299738 + ... + 476745.

It is an arithmetic number, because the mean of its divisors is an integer number (2323628370).

Almost surely, 2^68721851432 is an apocalyptic number.

It is an amenable number.

68721851432 is an abundant number, since it is smaller than the sum of its proper divisors (79990364248).

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

68721851432 is a wasteful number, since it uses less digits than its factorization.

68721851432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776562 (or 776558 counting only the distinct ones).

The product of its digits is 645120, while the sum is 47.

The spelling of 68721851432 in words is "sixty-eight billion, seven hundred twenty-one million, eight hundred fifty-one thousand, four hundred thirty-two".