3651731865600 has 2160 divisors, whose sum is σ = 15926473223808. Its totient is φ = 718735933440.

The previous prime is 3651731865491. The next prime is 3651731865641. The reversal of 3651731865600 is 65681371563.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 32316211144 + ... + 32316211256.

Almost surely, 2^{3651731865600} is an apocalyptic number.

3651731865600 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 3651731865600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7963236611904).

3651731865600 is an abundant number, since it is smaller than the sum of its proper divisors (12274741358208).

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

3651731865600 is a wasteful number, since it uses less digits than its factorization.

3651731865600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 51.

The spelling of 3651731865600 in words is "three trillion, six hundred fifty-one billion, seven hundred thirty-one million, eight hundred sixty-five thousand, six hundred".