68903533440 has 768 divisors, whose sum is σ = 298886112000. Its totient is φ = 14916980736.

The previous prime is 68903533411. The next prime is 68903533483. The reversal of 68903533440 is 4433530986.

68903533440 is a `hidden beast` number, since 68 + 90 + 35 + 33 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16085539 + ... + 16089821.

It is an arithmetic number, because the mean of its divisors is an integer number (389174625).

Almost surely, 2^68903533440 is an apocalyptic number.

68903533440 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 68903533440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149443056000).

68903533440 is an abundant number, since it is smaller than the sum of its proper divisors (229982578560).

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

68903533440 is a wasteful number, since it uses less digits than its factorization.

68903533440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4344 (or 4319 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 45.

The spelling of 68903533440 in words is "sixty-eight billion, nine hundred three million, five hundred thirty-three thousand, four hundred forty".