3654721536 has 56 divisors (see below), whose sum is σ = 9745394784. Its totient is φ = 1218232320.

The previous prime is 3654721531. The next prime is 3654721541. The reversal of 3654721536 is 6351274563.

It is an interprime number because it is at equal distance from previous prime (3654721531) and next prime (3654721541).

It is not an unprimeable number, because it can be changed into a prime (3654721531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49780 + ... + 98931.

Almost surely, 2^3654721536 is an apocalyptic number.

It is an amenable number.

3654721536 is an abundant number, since it is smaller than the sum of its proper divisors (6090673248).

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

3654721536 is an equidigital number, since it uses as much as digits as its factorization.

3654721536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148740 (or 148716 counting only the distinct ones).

The product of its digits is 453600, while the sum is 42.

The square root of 3654721536 is about 60454.2929493018. The cubic root of 3654721536 is about 1540.3453343730.

The spelling of 3654721536 in words is "three billion, six hundred fifty-four million, seven hundred twenty-one thousand, five hundred thirty-six".