68731619040 has 384 divisors, whose sum is σ = 276096522240. Its totient is φ = 15643238400.

The previous prime is 68731619039. The next prime is 68731619051. The reversal of 68731619040 is 4091613786.

It is a happy number.

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 63 ways as a sum of consecutive naturals, for example, 7283125 + ... + 7292555.

It is an arithmetic number, because the mean of its divisors is an integer number (719001360).

Almost surely, 2^68731619040 is an apocalyptic number.

68731619040 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 68731619040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138048261120).

68731619040 is an abundant number, since it is smaller than the sum of its proper divisors (207364903200).

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

68731619040 is a wasteful number, since it uses less digits than its factorization.

68731619040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9703 (or 9689 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 68731619040 in words is "sixty-eight billion, seven hundred thirty-one million, six hundred nineteen thousand, forty".