3654563820 has 24 divisors (see below), whose sum is σ = 10232778864. Its totient is φ = 974550336.

The previous prime is 3654563761. The next prime is 3654563821. The reversal of 3654563820 is 283654563.

It is not an unprimeable number, because it can be changed into a prime (3654563821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30454639 + ... + 30454758.

It is an arithmetic number, because the mean of its divisors is an integer number (426365786).

Almost surely, 2^3654563820 is an apocalyptic number.

3654563820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3654563820 is an abundant number, since it is smaller than the sum of its proper divisors (6578215044).

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

3654563820 is a wasteful number, since it uses less digits than its factorization.

3654563820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60909409 (or 60909407 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

The square root of 3654563820 is about 60452.9885117353. The cubic root of 3654563820 is about 1540.3231766794.

The spelling of 3654563820 in words is "three billion, six hundred fifty-four million, five hundred sixty-three thousand, eight hundred twenty".