696158281728 has 1344 divisors, whose sum is σ = 2658654210240. Its totient is φ = 180592312320.

The previous prime is 696158281657. The next prime is 696158281781. The reversal of 696158281728 is 827182851696.

696158281728 is a `hidden beast` number, since 6 + 9 + 615 + 8 + 2 + 8 + 1 + 7 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a Harshad number since it is a multiple of its sum of digits (63).

Its product of digits (23224320) is a multiple of the sum of its prime factors (135).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11412430818 + ... + 11412430878.

It is an arithmetic number, because the mean of its divisors is an integer number (1978165335).

Almost surely, 2^696158281728 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 696158281728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1329327105120).

696158281728 is an abundant number, since it is smaller than the sum of its proper divisors (1962495928512).

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

696158281728 is an frugal number, since it uses more digits than its factorization.

696158281728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 86 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 63.

The spelling of 696158281728 in words is "six hundred ninety-six billion, one hundred fifty-eight million, two hundred eighty-one thousand, seven hundred twenty-eight".