9645657408 has 84 divisors (see below), whose sum is σ = 28169276148. Its totient is φ = 3154544640.

The previous prime is 9645657383. The next prime is 9645657451. The reversal of 9645657408 is 8047565469.

9645657408 is a `hidden beast` number, since 9 + 6 + 4 + 565 + 74 + 0 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3135104064 + 6510553344 = 55992^2 + 80688^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127453 + ... + 188508.

Almost surely, 2^9645657408 is an apocalyptic number.

It is an amenable number.

9645657408 is an abundant number, since it is smaller than the sum of its proper divisors (18523618740).

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

9645657408 is a wasteful number, since it uses less digits than its factorization.

9645657408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316032 (or 316019 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The square root of 9645657408 is about 98212.3078234088. The cubic root of 9645657408 is about 2128.6811328926.

The spelling of 9645657408 in words is "nine billion, six hundred forty-five million, six hundred fifty-seven thousand, four hundred eight".