68490553848 has 256 divisors, whose sum is σ = 187260595200. Its totient is φ = 20808990720.

The previous prime is 68490553847. The next prime is 68490553871. The reversal of 68490553848 is 84835509486.

It is a Cunningham number, because it is equal to 261707²-1.

It is a junction number, because it is equal to n+sod(n) for n = 68490553791 and 68490553800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68490553843) 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 63 ways as a sum of consecutive naturals, for example, 354873240 + ... + 354873432.

It is an arithmetic number, because the mean of its divisors is an integer number (731486700).

Almost surely, 2^68490553848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68490553848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93630297600).

68490553848 is an abundant number, since it is smaller than the sum of its proper divisors (118770041352).

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

68490553848 is a wasteful number, since it uses less digits than its factorization.

68490553848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 33177600, while the sum is 60.

The spelling of 68490553848 in words is "sixty-eight billion, four hundred ninety million, five hundred fifty-three thousand, eight hundred forty-eight".