68215578795 has 96 divisors (see below), whose sum is σ = 145709770752. Its totient is φ = 28749240576.

The previous prime is 68215578793. The next prime is 68215578811. The reversal of 68215578795 is 59787551286.

68215578795 is a `hidden beast` number, since 6 + 8 + 2 + 1 + 557 + 8 + 79 + 5 = 666.

It is not a de Polignac number, because 68215578795 - 2¹ = 68215578793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (68215578793) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3376494 + ... + 3396636.

It is an arithmetic number, because the mean of its divisors is an integer number (1517810112).

Almost surely, 2^68215578795 is an apocalyptic number.

68215578795 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

68215578795 is an abundant number, since it is smaller than the sum of its proper divisors (77494191957).

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

68215578795 is a wasteful number, since it uses less digits than its factorization.

68215578795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21001 (or 20998 counting only the distinct ones).

The product of its digits is 42336000, while the sum is 63.

The spelling of 68215578795 in words is "sixty-eight billion, two hundred fifteen million, five hundred seventy-eight thousand, seven hundred ninety-five".