68401885797 has 36 divisors (see below), whose sum is σ = 121694604876. Its totient is φ = 36787564800.

The previous prime is 68401885789. The next prime is 68401885817. The reversal of 68401885797 is 79758810486.

68401885797 is a `hidden beast` number, since 6 + 8 + 40 + 18 + 8 + 579 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 55259785476 + 13142100321 = 235074^2 + 114639^2 .

It is not a de Polignac number, because 68401885797 - 2³ = 68401885789 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68401885787) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4554454 + ... + 4569447.

It is an arithmetic number, because the mean of its divisors is an integer number (3380405691).

Almost surely, 2^68401885797 is an apocalyptic number.

It is an amenable number.

68401885797 is a deficient number, since it is larger than the sum of its proper divisors (53292719079).

68401885797 is a wasteful number, since it uses less digits than its factorization.

68401885797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9123938 (or 9123928 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 63.

The spelling of 68401885797 in words is "sixty-eight billion, four hundred one million, eight hundred eighty-five thousand, seven hundred ninety-seven".