69990528816 has 320 divisors, whose sum is σ = 220575882240. Its totient is φ = 21118648320.

The previous prime is 69990528809. The next prime is 69990528841. The reversal of 69990528816 is 61882509996.

69990528816 is a `hidden beast` number, since 6 + 9 + 9 + 90 + 528 + 8 + 16 = 666.

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, 102474811 + ... + 102475493.

It is an arithmetic number, because the mean of its divisors is an integer number (689299632).

Almost surely, 2^69990528816 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 69990528816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110287941120).

69990528816 is an abundant number, since it is smaller than the sum of its proper divisors (150585353424).

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

69990528816 is a wasteful number, since it uses less digits than its factorization.

69990528816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041 (or 1029 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 63.

The spelling of 69990528816 in words is "sixty-nine billion, nine hundred ninety million, five hundred twenty-eight thousand, eight hundred sixteen".