9645655271616 has 756 divisors, whose sum is σ = 35397650905344. Its totient is φ = 2502130176000.

The previous prime is 9645655271599. The next prime is 9645655271621. The reversal of 9645655271616 is 6161725565469.

9645655271616 is a `hidden beast` number, since 9 + 6 + 4 + 5 + 6 + 5 + 5 + 2 + 7 + 1 + 616 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 290944641 + ... + 290977791.

Almost surely, 2^{9645655271616} is an apocalyptic number.

9645655271616 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9645655271616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17698825452672).

9645655271616 is an abundant number, since it is smaller than the sum of its proper divisors (25751995633728).

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

9645655271616 is a wasteful number, since it uses less digits than its factorization.

9645655271616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33270 (or 33237 counting only the distinct ones).

The product of its digits is 81648000, while the sum is 63.

The spelling of 9645655271616 in words is "nine trillion, six hundred forty-five billion, six hundred fifty-five million, two hundred seventy-one thousand, six hundred sixteen".