68820304821 has 16 divisors (see below), whose sum is σ = 93010848000. Its totient is φ = 45256094208.

The previous prime is 68820304799. The next prime is 68820304831. The reversal of 68820304821 is 12840302886.

It is a happy number.

It is not a de Polignac number, because 68820304821 - 2¹¹ = 68820302773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68820304831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110205 + ... + 387021.

It is an arithmetic number, because the mean of its divisors is an integer number (5813178000).

Almost surely, 2^68820304821 is an apocalyptic number.

It is an amenable number.

68820304821 is a deficient number, since it is larger than the sum of its proper divisors (24190543179).

68820304821 is a wasteful number, since it uses less digits than its factorization.

68820304821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277948.

The product of its (nonzero) digits is 147456, while the sum is 42.

The spelling of 68820304821 in words is "sixty-eight billion, eight hundred twenty million, three hundred four thousand, eight hundred twenty-one".