3651636480 has 72 divisors (see below), whose sum is σ = 11662426272. Its totient is φ = 973768704.

The previous prime is 3651636451. The next prime is 3651636481. The reversal of 3651636480 is 846361563.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3651636481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471634 + ... + 479313.

Almost surely, 2^3651636480 is an apocalyptic number.

3651636480 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3651636480 is an abundant number, since it is smaller than the sum of its proper divisors (8010789792).

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

3651636480 is an equidigital number, since it uses as much as digits as its factorization.

3651636480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950971 (or 950957 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 3651636480 is about 60428.7719550878. The cubic root of 3651636480 is about 1539.9117957015.

The spelling of 3651636480 in words is "three billion, six hundred fifty-one million, six hundred thirty-six thousand, four hundred eighty".