68172851728840 has 32 divisors (see below), whose sum is σ = 153495510624000. Its totient is φ = 27250190605504.

The previous prime is 68172851728823. The next prime is 68172851728871. The reversal of 68172851728840 is 4882715827186.

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, 592131910 + ... + 592247029.

It is an arithmetic number, because the mean of its divisors is an integer number (4796734707000).

Almost surely, 2^{68172851728840} is an apocalyptic number.

It is an amenable number.

68172851728840 is an abundant number, since it is smaller than the sum of its proper divisors (85322658895160).

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

68172851728840 is a wasteful number, since it uses less digits than its factorization.

68172851728840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184380389 (or 1184380385 counting only the distinct ones).

The product of its (nonzero) digits is 96337920, while the sum is 67.

The spelling of 68172851728840 in words is "sixty-eight trillion, one hundred seventy-two billion, eight hundred fifty-one million, seven hundred twenty-eight thousand, eight hundred forty".