695643648 has 320 divisors, whose sum is σ = 2309852160. Its totient is φ = 181665792.

The previous prime is 695643629. The next prime is 695643727. The reversal of 695643648 is 846346596.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 695643648.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7171536 + ... + 7171632.

It is an arithmetic number, because the mean of its divisors is an integer number (7218288).

Almost surely, 2^695643648 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 695643648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1154926080).

695643648 is an abundant number, since it is smaller than the sum of its proper divisors (1614208512).

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

695643648 is a wasteful number, since it uses less digits than its factorization.

695643648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 161 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 51.

The square root of 695643648 is about 26375.0573079946. The cubic root of 695643648 is about 886.0582520932.

The spelling of 695643648 in words is "six hundred ninety-five million, six hundred forty-three thousand, six hundred forty-eight".