6969145728 has 128 divisors (see below), whose sum is σ = 19490388480. Its totient is φ = 2202066944.

The previous prime is 6969145663. The next prime is 6969145747. The reversal of 6969145728 is 8275419696.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 994525 + ... + 1001507.

It is an arithmetic number, because the mean of its divisors is an integer number (152268660).

Almost surely, 2^6969145728 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 6969145728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9745194240).

6969145728 is an abundant number, since it is smaller than the sum of its proper divisors (12521242752).

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

6969145728 is a wasteful number, since it uses less digits than its factorization.

6969145728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7136 (or 7124 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 57.

The square root of 6969145728 is about 83481.4094754036. The cubic root of 6969145728 is about 1910.1164670443.

The spelling of 6969145728 in words is "six billion, nine hundred sixty-nine million, one hundred forty-five thousand, seven hundred twenty-eight".