68836990320 has 640 divisors, whose sum is σ = 279067852800. Its totient is φ = 15269409792.

The previous prime is 68836990279. The next prime is 68836990331. The reversal of 68836990320 is 2309963886.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 155388019 + ... + 155388461.

It is an arithmetic number, because the mean of its divisors is an integer number (436043520).

Almost surely, 2^68836990320 is an apocalyptic number.

68836990320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68836990320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139533926400).

68836990320 is an abundant number, since it is smaller than the sum of its proper divisors (210230862480).

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

68836990320 is a wasteful number, since it uses less digits than its factorization.

68836990320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754 (or 742 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The spelling of 68836990320 in words is "sixty-eight billion, eight hundred thirty-six million, nine hundred ninety thousand, three hundred twenty".