68121508 has 48 divisors (see below), whose sum is σ = 151481344. Its totient is φ = 26075520.

The previous prime is 68121497. The next prime is 68121523. The reversal of 68121508 is 80512186.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a self number, because there is not a number n which added to its sum of digits gives 68121508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8266 + ... + 14302.

Almost surely, 2^68121508 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 68121508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75740672).

68121508 is an abundant number, since it is smaller than the sum of its proper divisors (83359836).

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

68121508 is a wasteful number, since it uses less digits than its factorization.

68121508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6092 (or 6090 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 68121508 is about 8253.5754676383. The cubic root of 68121508 is about 408.4084801120.

The spelling of 68121508 in words is "sixty-eight million, one hundred twenty-one thousand, five hundred eight".