69945647616 has 240 divisors, whose sum is σ = 219341258136. Its totient is φ = 21329215488.

The previous prime is 69945647593. The next prime is 69945647659. The reversal of 69945647616 is 61674654996.

69945647616 is a `hidden beast` number, since 6 + 9 + 9 + 4 + 5 + 6 + 4 + 7 + 616 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 34631721216 + 35313926400 = 186096^2 + 187920^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6763986 + ... + 6774318.

Almost surely, 2^69945647616 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 69945647616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109670629068).

69945647616 is an abundant number, since it is smaller than the sum of its proper divisors (149395610520).

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

69945647616 is a wasteful number, since it uses less digits than its factorization.

69945647616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10483 (or 10464 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 63.

The spelling of 69945647616 in words is "sixty-nine billion, nine hundred forty-five million, six hundred forty-seven thousand, six hundred sixteen".