3651636736 has 60 divisors (see below), whose sum is σ = 8019861696. Its totient is φ = 1659806720.

The previous prime is 3651636727. The next prime is 3651636739. The reversal of 3651636736 is 6376361563.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3651636739) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32481 + ... + 91423.

Almost surely, 2^3651636736 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 3651636736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4009930848).

3651636736 is an abundant number, since it is smaller than the sum of its proper divisors (4368224960).

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

3651636736 is an equidigital number, since it uses as much as digits as its factorization.

3651636736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58983 (or 58956 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 46.

The square root of 3651636736 is about 60428.7740732840. The cubic root of 3651636736 is about 1539.9118316870.

The spelling of 3651636736 in words is "three billion, six hundred fifty-one million, six hundred thirty-six thousand, seven hundred thirty-six".