3997656633600 has 1080 divisors, whose sum is σ = 17438170219008. Its totient is φ = 884249395200.

The previous prime is 3997656633583. The next prime is 3997656633611. The reversal of 3997656633600 is 63366567993.

3997656633600 is a `hidden beast` number, since 3 + 9 + 9 + 7 + 6 + 566 + 3 + 3 + 60 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1080).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 112475032 + ... + 112510568.

Almost surely, 2^{3997656633600} is an apocalyptic number.

3997656633600 is a gapful number since it is divisible by the number (30) 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 3997656633600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8719085109504).

3997656633600 is an abundant number, since it is smaller than the sum of its proper divisors (13440513585408).

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

3997656633600 is a wasteful number, since it uses less digits than its factorization.

3997656633600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35613 (or 35585 counting only the distinct ones).

The product of its (nonzero) digits is 99202320, while the sum is 63.

The spelling of 3997656633600 in words is "three trillion, nine hundred ninety-seven billion, six hundred fifty-six million, six hundred thirty-three thousand, six hundred".