69488729856 has 648 divisors, whose sum is σ = 253817338320. Its totient is φ = 18121162752.

The previous prime is 69488729851. The next prime is 69488729873. The reversal of 69488729856 is 65892788496.

69488729856 is a `hidden beast` number, since 6 + 9 + 488 + 7 + 2 + 98 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69488729851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 165844015 + ... + 165844433.

Almost surely, 2^69488729856 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 69488729856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126908669160).

69488729856 is an abundant number, since it is smaller than the sum of its proper divisors (184328608464).

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

69488729856 is a wasteful number, since it uses less digits than its factorization.

69488729856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581 (or 557 counting only the distinct ones).

The product of its digits is 418037760, while the sum is 72.

The spelling of 69488729856 in words is "sixty-nine billion, four hundred eighty-eight million, seven hundred twenty-nine thousand, eight hundred fifty-six".