68515131801 has 8 divisors (see below), whose sum is σ = 91570502464. Its totient is φ = 45568257840.

The previous prime is 68515131793. The next prime is 68515131823. The reversal of 68515131801 is 10813151586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68515131801 - 2³ = 68515131793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68515131801.

It is not an unprimeable number, because it can be changed into a prime (68515131851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27122701 + ... + 27125226.

It is an arithmetic number, because the mean of its divisors is an integer number (11446312808).

Almost surely, 2^68515131801 is an apocalyptic number.

It is an amenable number.

68515131801 is a deficient number, since it is larger than the sum of its proper divisors (23055370663).

68515131801 is a wasteful number, since it uses less digits than its factorization.

68515131801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54248351.

The product of its (nonzero) digits is 28800, while the sum is 39.

The spelling of 68515131801 in words is "sixty-eight billion, five hundred fifteen million, one hundred thirty-one thousand, eight hundred one".