68354391028 has 72 divisors (see below), whose sum is σ = 152180489664. Its totient is φ = 26564832000.

The previous prime is 68354391011. The next prime is 68354391047. The reversal of 68354391028 is 82019345386.

It is a super-3 number, since 3×68354391028³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 825025 + ... + 904087.

It is an arithmetic number, because the mean of its divisors is an integer number (2113617912).

Almost surely, 2^68354391028 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 68354391028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76090244832).

68354391028 is an abundant number, since it is smaller than the sum of its proper divisors (83826098636).

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

68354391028 is a wasteful number, since it uses less digits than its factorization.

68354391028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79493 (or 79484 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 68354391028 in words is "sixty-eight billion, three hundred fifty-four million, three hundred ninety-one thousand, twenty-eight".