69780447423840 has 768 divisors, whose sum is σ = 239509996830720. Its totient is φ = 17039149424640.

The previous prime is 69780447423823. The next prime is 69780447423859. The reversal of 69780447423840 is 4832474408796.

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, 3572794875 + ... + 3572814405.

It is an arithmetic number, because the mean of its divisors is an integer number (311861975040).

Almost surely, 2^{69780447423840} is an apocalyptic number.

69780447423840 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 69780447423840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119754998415360).

69780447423840 is an abundant number, since it is smaller than the sum of its proper divisors (169729549406880).

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

69780447423840 is a wasteful number, since it uses less digits than its factorization.

69780447423840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19795 (or 19787 counting only the distinct ones).

The product of its (nonzero) digits is 260112384, while the sum is 66.

The spelling of 69780447423840 in words is "sixty-nine trillion, seven hundred eighty billion, four hundred forty-seven million, four hundred twenty-three thousand, eight hundred forty".