68104921540 has 48 divisors (see below), whose sum is σ = 143914639680. Its totient is φ = 27072017280.

The previous prime is 68104921523. The next prime is 68104921657. The reversal of 68104921540 is 4512940186.

It is a junction number, because it is equal to n+sod(n) for n = 68104921493 and 68104921502.

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, 2870446 + ... + 2894074.

It is an arithmetic number, because the mean of its divisors is an integer number (2998221660).

Almost surely, 2^68104921540 is an apocalyptic number.

It is an amenable number.

68104921540 is an abundant number, since it is smaller than the sum of its proper divisors (75809718140).

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

68104921540 is a wasteful number, since it uses less digits than its factorization.

68104921540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24532 (or 24530 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 68104921540 in words is "sixty-eight billion, one hundred four million, nine hundred twenty-one thousand, five hundred forty".